Season 1 (2009)

6.31 avg 72 episodes 6.9 → 7.6 52 min avg

Big finale
Rebound

Season 1 episodes — IMDb ratings
#	Title	Rating	Votes
1	Series Premiere: Audition 1	6.9	36
2	Audition 2	6.1	26
3	Audition 3	6.5	23
4	Top 50 Part 1	6.6	22
5	Top 50 Part 2	6.2	20
6	Top 20 Revealed	6.0	22
7	20 Ways with Chicken	5.9	23
8	Sam and the Sausage	6.5	21
9	Sushi Stress	6.1	21
10	Team Elimination	5.8	20
11	Masterclass 1: Cooking with the Masters	6.4	20
12	Invention Test	6.2	19
13	Pressure Test Elimination	6.5	19
14	Celebrity Chef Challenge 2	6.2	19
15	Seafood Banquet Team Challenge	6.1	20
16	Team Elimination 1	6.1	19
17	Masterclass 2: Class Is In	6.6	18
18	Invention Test 2	6.4	20
19	Pressure Test Elimination 2	6.2	20
20	Celebrity Chef Challenge 3	6.1	22
21	Food Critics Team Challenge	6.4	21
22	Team Elimination 2	5.8	20
23	Masterclass 3: Soufflés and Stir-fries	6.6	19
24	Invention Test 3	6.4	21
25	Pressure Test Elimination 3	6.4	20
26	Celebrity Chef Challenge 4	5.9	18
27	Royal Easter Show Team Challenge	6.1	19
28	Team Elimination 3	5.9	19
29	Masterclass 4: The Perfect Chip	6.5	18
30	Invention Test 4	6.2	18
31	Pressure Test Elimination 4	5.9	18
32	Celebrity Chef Challenge 5	6.1	18
33	Fresh Seafood Team Challenge	6.1	17
34	Team Elimination 4	6.0	17
35	Masterclass 5: Lemon Goodness	6.5	17
36	Invention: Test 5	6.3	18
37	Pressure Test Elimination 5	6.1	18
38	Celebrity Chef Challenge 6	5.9	18
39	Martini Club Team Challenge	6.3	18
40	Team Elimination 6	5.9	18
41	Masterclass 6: Sweet Treats	6.4	18
42	Invention: Test 6	6.2	18
43	Pressure Test Elimination 6	6.2	18
44	Celebrity Chef Challenge 7	5.9	18
45	Wedding Challenge	5.9	18
46	Taste Test Elimination	6.2	19
47	Masterclass 7: Cocktail Hour	6.4	19
48	Hong Kong: Arrival	6.4	19
49	Hong Kong: High Tea	6.2	19
50	Celebrity Chef Challenge 8	6.2	17
51	Hong Kong: Mystery Steamer Challenge	6.1	17
52	Pressure Test Elimination 8	6.1	18
53	MasterClass 8	6.9	17
54	Invention: Test 7	6.4	17
55	Dream Restaurant Challenge	6.6	18
56	Celebrity Chef Challenge 9	6.1	18
57	HMAS Kanimbla Challenge	6.6	17
58	Taste Test Elimination	6.1	17
59	Masterclass 9	7.0	17
60	Invention: Test 8	6.4	17
61	Pressure Test Elimination 9	6.4	17
62	Celebrity Chef Challenge 10	6.4	17
63	Matt Preston's Formal Dinner Challenge	6.7	18
64	Taste Test Elimination	6.4	17
65	Master Class 10	6.9	17
66	Invention: Test 9	6.5	17
67	Elimination Challenge 1	6.5	17
68	Elimination Challenge 2	6.4	18
69	Elimination Challenge 3	6.4	18
70	Elimination Challenge 4	6.3	18
71	Masterclass Reunion	6.8	20
72	Finale Night	7.6	24

Season 2 (2010)

6.66 avg 84 episodes 6.6 → 8.0 66 min avg

Big finale
Rebound

Season 2 episodes — IMDb ratings
#	Title	Rating	Votes
1	Series Premiere: Top 50 - Part 1	6.6	25
2	Top 50 Part 2	6.8	22
3	Top 50 Part 3	6.6	22
4	Top 50 Part 4	6.8	20
5	MasterClass 1	6.5	18
6	Top 50 Part 5	6.7	20
7	Top 24 Cooking Challenge	6.4	20
8	Celebrity Chef Challenge 1	6.3	19
9	Off Site Challenge 1	6.6	19
10	Elimination Challenge 1	6.1	19
11	MasterClass 2	6.1	17
12	Invention Test 2	6.5	18
13	Pressure Test Elimination 1	6.6	18
14	Celebrity Chef Challenge 2	6.5	18
15	Off Site Challenge 2	6.6	18
16	Elimination Challenge 2	6.5	18
17	MasterClass 3	6.7	18
18	Invention Test 3	6.5	18
19	Pressure Test Elimination 2	6.4	18
20	Celebrity Chef Challenge 3	6.2	18
21	Off Site Challenge 3	6.5	18
22	Elimination Challenge 3	6.2	18
23	MasterClass 4	6.3	17
24	Invention Test 4	6.7	18
25	Pressure Test Elimination 3	6.6	18
26	Celebrity Chef Challenge 4	6.2	18
27	Off Site Challenge 4	6.5	18
28	Elimination Challenge 4	6.6	18
29	MasterClass 5	6.6	17
30	Invention Test 5	6.8	18
31	Pressure Test Elimination 4	6.5	18
32	Celebrity Chef Challenge 5	6.4	18
33	Off Site Challenge 5	6.8	19
34	Elimination Challenge 5	6.4	18
35	MasterClass 6	6.3	17
36	Invention Test 6	6.5	18
37	Pressure Test Elimination 5	6.8	18
38	Celebrity Chef Challenge 6	6.4	18
39	Off Site Challenge 6	6.5	18
40	Elimination Challenge 6	6.2	19
41	MasterClass 7	6.1	16
42	Invention Test 7	7.0	17
43	Pressure Test Elimination 6	7.2	18
44	Celebrity Chef Challenge 7	6.8	17
45	Off Site Challenge 7	6.8	17
46	Elimination Challenge 7	6.9	17
47	MasterClass 8	6.6	14
48	Invention Test 8	6.8	18
49	Pressure Test Elimination 7	7.0	18
50	Celebrity Chef Challenge 8	6.7	18
51	Off Site Challenge 8	6.9	18
52	Elimination Challenge 8	6.6	18
53	MasterClass 9	6.8	14
54	Invention Test 9	6.9	17
55	Pressure Test 8	6.9	17
56	Celebrity Chef Challenge 9	6.8	17
57	Super Challenge	6.8	18
58	Elimination Challenge 9	6.9	18
59	MasterClass 10	6.4	15
60	Elimination Challenge 10	6.5	17
61	Elimination Challenge 11	6.7	18
62	Celebrity Chef Challenge 10	6.8	17
63	Off Site Challenge 9	6.6	17
64	Elimination Challenge 12	6.7	16
65	MasterClass 11	6.8	13
66	Invention Test 10	6.9	16
67	Pressure Test Elimination 9	6.1	17
68	Celebrity Chef Challenge 11	6.5	14
69	Off Site Challenge 10	6.8	15
70	Elimination Challenge 13	6.7	16
71	MasterClass 12	6.6	12
72	Invention Test 11	6.7	15
73	Pressure Test Elimination 10	6.7	15
74	Celebrity Chef Challenge 12	6.8	15
75	Signature Dish Challenge	7.4	15
76	Elimination Challenge 14	7.1	15
77	MasterClass 13	6.5	12
78	Invention Test 12	7.1	15
79	Finals Week Elimination 1	6.9	16
80	Finals Week Elimination 2	7.1	15
81	Finals Week Elimination 3	7.0	15
82	Finals Week Elimination 4	7.0	15
83	MasterClass Reunion	7.1	14
84	Finale Night	8.0	16

Season 4 (2012)

6.33 avg 71 episodes 6.9 → 7.6 64 min avg

Big finale
Rebound

Season 4 episodes — IMDb ratings
#	Title	Rating	Votes
0	Where Are They Now?	6.9	12
1	Auditions	6.0	15
2	Top 50: Mystery Box	6.7	14
3	Top 50: Mornington Peninsula Challenge	6.4	14
4	Top 50: Salmon Challenge	6.5	14
5	Top 50: Pressure Test	6.4	14
6	Masterclass 1	5.5	11
7	Top 50: Elimination Challenge - French Cuisine	6.5	14
8	Top 24: Mystery Box	6.3	14
9	Immunity Challenge: Dan Hong	6.5	15
10	Offsite Challenge: King's Cross	6.5	14
11	Elimination Challenge: Pasta	6.9	15
12	Masterclass 2	6.0	11
13	Mystery Box: Have a Crack at It & Invention Test: The Perfect Sandwich	6.6	14
14	Pressure Test: Peter Gilmore	6.4	14
15	Immunity Challenge: 3 Blue Ducks	6.5	14
16	Offsite Challenge: Yum Cha	6.3	14
17	Elimination Challenge: Tagine	6.4	14
18	Masterclass 3	5.8	11
19	Mystery Box: Biscuits & Invention Test: Mexican	6.4	14
20	Pressure Test: Maggie Beer	6.2	14
21	Immunity Challenge: Shaun Presland	6.0	14
22	Offsite Challenge: Leftovers	6.4	14
23	Elimination Challenge: Poultry	6.5	15
24	Masterclass 4	6.0	11
25	Mystery Box: Flavour Matching & Invention Test: Seduction	6.4	14
26	Offsite Challenge: Salamanca Market	6.4	14
27	Immunity Challenge: Fishing For Salmon Challenge & Philippe Leban	6.2	14
28	Offsite Challenge: Afternoon Tea	6.5	14
29	Elimination Challenge: Pub Lunch	6.9	17
30	Masterclass 5	5.9	11
31	Mystery Box & Seafood from Around the World with Rick Stein	6.6	14
32	Elimination Challenge: Greek Salad	6.1	14
33	Immunity Challenge: Jamie Oliver	6.7	16
34	Offsite Challenge: Shangri La Hotel 24-Hour Challenge	6.3	14
35	Pressure Test: Rapid Fire	6.4	14
36	Masterclass 6	5.9	11
37	Mystery Box: Masterchef Australia Winners	6.5	15
38	Pressure Test: Quiche Lorraine	6.2	16
39	Immunity Challenge: Hamish Ingham	6.3	15
40	Offsite Challenge: Hindu Wedding	6.6	17
41	Elimination Challenge: Cake	5.7	15
42	Masterclass 7	5.9	12
43	Mystery Box: Soup & Invention Test - Dude Food	6.3	16
44	Pressure Test: Christine Manfield	6.1	16
45	Immunity Challenge: Daniel Wilson	5.9	15
46	Offsite Challenge: Home Cooking	6.1	15
47	Elimination Challenge: Quick Fire Cook-Off	6.1	14
48	Masterclass 8	5.9	12
49	Invention Test: Heston Blumenthal	6.6	14
50	Pressure Test: Vincent Gadan	6.3	14
51	Immunity Challenge: Tomislav Martinovic	6.1	14
52	Team Challenge: Pop-up Restaurants	6.7	14
53	Elimination Challenge: Double Elimination	6.3	14
54	Masterclass 9	6.2	13
55	Invention Test: Rome	6.7	15
56	Immunity Challenge: Pasta & Pizza	6.2	15
57	Immunity Challenge: Antonio Carluccio	6.2	15
58	Risotto Challenge with Gualtiero Marchesi	6.3	15
59	Elimination Challenge: Feast in Monticchelo	6.2	15
60	Masterclass 10	6.0	13
61	Mystery Box: Fridge Ingredients	6.2	14
62	Pressure Test: Grant King	6.3	15
63	Elimination Challenge: Kylie Kwong	6.8	14
64	Team Challenge: Edible Centrepiece	6.3	14
65	Elimination Challenge: Dish They've Missed the Most	6.4	14
66	Masterclass 11	6.1	14
67	Finals Week: Guillaume at Bennelong	6.6	14
68	Finals Week: Perfect Sauce for a Perfect Stake	6.4	14
69	Finals Week: Signature Dishes	6.5	15
70	MasterChef 2012 Finale	7.6	20

Season 7 (2015)

7.45 avg 62 episodes 7.0 → 8.4 62 min avg

Big finale

Season 7 episodes — IMDb ratings
#	Title	Rating	Votes
1	Series Premiere: Auditions Part 1	7.0	23
2	Auditions Part 2	7.1	19
3	Top 24 Mystery Box Challenge	7.2	18
4	Massimo Bottura Team Challenge	7.4	19
5	Elimination Challenge	7.1	18
6	Mystery Box Challenge and Invention Test	7.3	17
7	Pressure Test: Sat Bains' Beef and Mushrooms	7.4	16
8	Immunity Challenge: Ben Williamson	7.4	16
9	Puckapunyal Team Challenge	7.4	16
10	Elimination Challenge 1	7.2	16
11	Marco's Mystery Box and Invention Test	7.2	16
12	Pressure Test: Lamb Noisettes à la Forestiere with Madeira Sauce	7.4	16
13	Immunity Challenge: Josh Pelham	7.5	16
14	Relay Team Challenge	7.8	18
15	The Fifth Judge Elimination Challenge + Masterclass	7.3	15
16	Maggie Beer's Mystery Box and Invention Test	7.3	15
17	Pressure Test: Anna Polyviou's Carrot Cake	7.4	15
18	Immunity Challenge: Duncan Welgemoed	7.3	16
19	Abbotsford Convent Bakery Team Challenge	7.5	15
20	Elimination Challenge: Thai Food	7.6	16
21	Mystery Box and Invention Test Poh Ling Yeow	7.4	16
22	Pressure Test: Kylie Millar's Toffee Apple	7.4	15
23	Immunity Challenge: Callum Hann	7.3	15
24	Mexican Street Food Team Challenge	7.5	15
25	Re-invention Elimination Challenge + Masterclass	7.5	15
26	"Dollar" Box Challenge and Invention Test	7.2	17
27	Pressure Test: Marcus Wareing's Braised Veal	7.4	16
28	Immunity Challenge: Nick Holloway	7.7	16
29	Italian Team Challenge	7.4	15
30	Mystery Box Elimination Challenge	7.1	15
31	Mystery Box Challenge and Invention Test	7.4	16
32	Pressure Test: The Sunday Roast	7.3	16
33	"The Duel" Immunity Challenge	7.2	16
34	Restaurant Takeover Team Challenge	7.4	17
35	Blind Taste Test Elimination Challenge	7.4	16
36	Heston Blumenthal Mystery Box Challenge and Invention Test	7.7	16
37	Pressure Test: Guillaume Brahimi's Jewel of the Sea	7.6	16
38	Immunity Challenge: Jim McDougall	7.5	16
39	Team Challenge: Afternoon Tea at the Hotel Windsor	7.6	16
40	Elimination Challenge and Second Chance Cook-Off	7.5	17
41	"Mystery" Mystery Box Challenge and Invention Test	7.6	16
42	Pressure Test: Janice Wong's Cassis Plum	7.4	16
43	Immunity Challenge: Ross Lusted	7.5	16
44	All American Barbecue Team Challenge	7.6	15
45	Elimination Challenge: Rick Stein	7.5	16
46	"Deja Vu" Mystery Box Challenge and Invention Test	7.3	15
47	Pressure Test: Darren Purchese	7.5	15
48	Immunity Challenge: Monty and Jaclyn Koludrovic	7.3	15
49	Seven-course Degustation Challenge	7.5	15
50	Elimination Challenge: Time Auction	7.4	16
51	Restaurant Service Team Challenge	7.7	16
52	"Keep Up with Marco" Challenge	7.6	16
53	Immunity Challenge: Shannon Bennett	7.5	16
54	French Restaurant Service Team Challenge	7.5	16
55	Childhood Food Memory Elimination + Masterclass	7.4	17
56	Mystery Box Challenge: Choose Your Own & Invention Test: Food Trends	7.6	17
57	Pressure Test: Grant King's Liquid Gnocchi with Mushroom Consommé	7.7	17
58	Cook Whatever You Want	7.5	17
59	The Press Club Service Challenge	7.5	17
60	Pressure Test + MasterClass	7.8	18
61	Grand Final Part 1	8.0	19
62	Finale	8.4	25

Season 8 (2016)

7.74 avg 63 episodes 8.2 → 8.5 62 min avg

Big finale
Rebound

Season 8 episodes — IMDb ratings
#	Title	Rating	Votes
1	Series Premiere: Auditions Part 1	8.2	25
2	Auditions Part 2	7.8	18
3	Auditions Part 3	7.6	18
4	Top 24 Mystery Box Challenge	7.7	18
5	Elimination Challenge	7.6	18
6	Marco's Mystery Box Challenge and Invention Test	7.7	18
7	Pressure Test: Marco Pierre White's Dory a la Nicoise	7.8	18
8	Immunity Challenge: Jake Kellie	7.9	18
9	Plough Hotel Team Challenge	8.0	18
10	Elimination Challenge: The Alphabet Game & MasterClass 1	7.7	18
11	"Viewers' Choice" Mystery Box Challenge & Invention Test	7.9	18
12	Pressure Test: Reynold Poernomo's "Moss"	7.9	18
13	Immunity Challenge: Braden White	7.9	18
14	Huxtable & Pei Modern Team Challenge	8.1	16
15	Raw and Cooked Elimination Challenge	7.3	16
16	Nigella's Mystery Box Challenge & Invention Test	7.4	16
17	Pressure Test: Nigella Lawson's Three-Course Dinner	7.4	16
18	Immunity Challenge: Lachlan Colwill	7.4	16
19	Team Challenge: Royal Children's Hospital Fête	7.8	16
20	Elimination Challenge: Name That Cake & MasterClass 2	7.3	15
21	Mystery Box Challenge & Leftovers Invention Test	7.7	15
22	Pressure Test: Jason Atherton's Quail Afternoon Tea Dish	7.5	16
23	Woodland House Immunity Challenge: Thomas Woods & Hayden McFarland	7.8	15
24	Off-site Challenge: Hellenic Republic	8.2	15
25	Elimination Challenge: Blind Taste Test	7.7	16
26	Invention Test: Maggie Beer & Mystery Box Challenge	7.9	16
27	Pressure Test: Anna Polyviou's "Mess"	7.8	16
28	Immunity Challenge: Morgan McGlone	7.4	16
29	Team Challenge: Chinese New Year	7.9	16
30	Elimination Challenge: Lucky Dip	7.4	16
31	Luke Nguyen's Mystery Box Challenge & Invention Test: Steam vs. Fry	7.7	15
32	Pressure Test: Ross Lusted	7.7	16
33	Second Chance Cook-Off	7.5	15
34	Sails by the Bay Team Challenge: Six-Course Degustation Menu	7.7	16
35	Nature Affinity Elimination Challenge	7.8	16
36	Mystery Box Challenge: Ugly Ingredients & Invention Test: Relay	7.9	15
37	Pressure Test: Flynn McGarry's Beet Wellington	7.5	15
38	Immunity Challenge: Victor Liong	7.7	15
39	Team Challenge: Gourmet Cinema	7.6	15
40	Elimination Challenge: Choose or Lose	7.6	15
41	Team Challenge: Melbourne Star	7.9	15
42	Team Challenge: Brighton Beach Ice Cream Stands	7.5	15
43	Team Challenge: Three-Course Dessert Spread	7.6	15
44	Service Challenge: Recipes from the Past	7.5	16
45	Elimination Challenge: Colours of the Rainbow & MasterClass 3	7.4	16
46	Mystery Box Challenge: All the Ingredients & Invention Test: Hardest Dishes	7.7	16
47	Pressure Test: Peter Gilmore's Cherry Jam Lamington	7.6	15
48	Immunity Challenge: Shannon Bennett	7.9	15
49	Team Challenge: Australian Produce	7.8	15
50	Elimination Challenge: Time Auction + Masterclass	8.0	15
51	Mystery Box Challenge: San Francisco Produce & Invention Test	8.1	16
52	Team Challenge: Dominque Creen's Signature Dishes	7.7	16
53	Fast Track to Finals: Francis Ford Coppola's Inglenook Estate	7.9	15
54	Team Challenge: Santa Monica Pier Food Trucks	8.4	18
55	Elimination Challenge: Put Your Dream on a Plate & MasterClass 4	7.9	16
56	Mystery Box Challenge: Hottest Ingredients & Invention Test: Hottest Techniques	7.6	15
57	Pressure Test: Christy Tania's Mistique	7.7	15
58	Service Challenge: Lake House	7.6	15
59	Elimination Challenge: Audition Ingredients	7.5	15
60	MasterClass 5	7.7	15
61	Mystery Box Challenge & Invention Test: Quarter Final	7.5	15
62	Service Challenge: Semi Final	8.4	14
63	MasterChef 2016 Grand Finale	8.5	24

Season 11 (2019)

6.92 avg 61 episodes 6.8 → 5.9 62 min avg

Season 11 episodes — IMDb ratings
#	Title	Rating	Votes
1	Auditions Part 1	6.8	19
2	Auditions Part 2	7.1	16
3	Desert Island Cooking Challenge	7.4	15
4	Immunity Challenge: Keeping up with Curtis Stone	7.5	15
5	Judges' Favourites Mystery Box Challenge & Black Box Elimination Challenge	7.5	15
6	Pressure Test: Darren Purchese's Bombe Alaska	7.4	12
7	Immunity Challenge: Max Sharrad	7.3	12
8	Briagolong Drought Buffet Team Challenge	7.2	12
9	Favourite Ingredients Elimination Challenge/Masterclass: George Calombaris, Poh Ling Yeow, Billie McKay, Matt Sinclair and Matt Preston	7.5	12
10	Nigella's Mystery Box Challenge & Team Relay Invention Test	7.5	12
11	Pressure Test: Nigella's Tarragon French Roast Chicken	7.5	12
12	Immunity Challenge: Coskun Uysal	7.4	12
13	Historical Three-Course Meal Team Challenge	7.5	12
14	Condiments Elimination Challenge/Masterclass: Gary Mehigan, Nigella Lawson and Matt Preston	7.2	12
15	Rick Stein's Mystery Box Challenge & Fish and Potatoes Invention Test	7.3	12
16	Pressure Test: Clare Smyth's Pear and Lemon Verbena Vacherin	7.8	14
17	Immunity Challenge: Donovan Cooke	7.2	15
18	Street Food Service Challenge	7.1	14
19	Deli Items Elimination Challenge	6.9	14
20	Dumpling Box Challenge & Top Secret Invention Test	7.1	14
21	Pressure Test: Leno Lattarulo's Seafood Paella	7.2	14
22	Immunity Challenge: Secret Chef	7.6	15
23	Italian Four-Course Meal Service Challenge	7.0	15
24	Blind Taste Test Elimination Challenge	6.8	13
25	Brisbane Box Challenge & Howard Smith Wharves Food Truck Challenge	7.2	14
26	Pressure Test: Shannon Kellam's Chocolate de Passion	6.7	14
27	Immunity Challenge: Ben Williamson	6.3	14
28	Noosa Barbecue Feast Team Challenge	6.5	14
29	Seafood Elimination Challenge/MasterClass: Ash Martin at The Homage, Spicers Hidden Vale	6.7	13
30	Everything Mystery Box Challenge and Whole Ingredients Invention Test	7.1	14
31	Lucky Dip Elimination Challenge and Second Chance Cook-Off	7.2	13
32	Immunity Challenge: Jesse McTavish	6.9	13
33	Picnic at Hanging Rock Team Challenge	7.0	13
34	Herbs and Spices Elimination Challenge	7.1	14
35	Heston's Mystery Box Challenge & Cereal Invention Test	6.9	13
36	Two-Day Pressure Test: Kate Reid's Black Forrest Lune Croissant	6.5	13
37	Immunity Challenge: Alice Wright	6.7	13
38	Blind Pairing Team Challenge	6.6	13
39	Sugar-Free Elimination Challenge	6.4	13
40	Best-Selling Mystery Box Challenge & Best-Loved Invention Test	7.0	12
41	Jock Zonfrillo's Challenge	7.1	12
42	Immunity Challenge: Phil Wood	7.5	12
43	Best Diners Team Challenge	7.5	12
44	Food Waste Management Elimination Challenge	7.0	12
45	Déjà Vu Mystery Box & Memories Invention Test	7.6	13
46	Pressure Test: Kirsten Tibballs' Apple Pie	7.1	13
47	Immunity Challenge: Adam D'Sylva	6.0	12
48	The Q Train Team Challenge	6.5	12
49	The Time Auction Elimination Challenge	5.8	13
50	Western Australia Mystery Box & Surf and Turf Invention Test	7.4	14
51	Wildflower Five-course Degustation challenge	6.3	11
52	Fast-Track to Finals Week Challenge	6.9	11
53	Leeuwin Estate Team Challenge	5.9	11
54	Two-Dish Pressure Test: Santiago Fernandez + MasterClass: Karl Wulf on Rottnest Island	6.3	11
55	Ingredient from Home Mystery Box & Judges Choice Invention Test	5.9	11
56	Pressure Test: Ashley Palmer-Watts' Lamington Cake	6.6	11
57	No Rules Challenge	5.5	11
58	The Press Club Service Challenge	6.2	13
59	Three-Round 'Duel' Elimination/MasterClass: Contestants vs. Judges and Mentors	6.3	11
60	Semi-Finals Pressure Test: Peter Gilmore	7.3	13
61	Grand Finale	5.9	17

Season 12 (2020)

6.78 avg 61 episodes 6.6 → 6.6 65 min avg

Mid-peak

Season 12 episodes — IMDb ratings
#	Title	Rating	Votes
1	Premiere: Immunity Challenge: Finale-Worthy Dish	6.6	38
2	Team Challenge	6.5	28
3	Relay Style Team Challenge	7.0	26
4	Immunity Challenge: Keeping Up with Gordon	6.5	23
5	Gordon Ramsay's 90-Minute Elimination Challenge	6.3	25
6	Ultimate BBQ Challenge	6.8	24
7	Two-Round Pressure Test: Orana	6.2	22
8	Melissa Leong's Mystery Box	6.7	22
9	Immunity Challenge: Judges' Taste Test / MasterClass	6.9	19
10	Judges' Ingredients Elimination Challenge	6.7	20
11	3-Round Team Showdown	5.5	23
12	Self Pressure Test	6.7	16
13	Barter Mystery Box	6.9	16
14	Curtis Stone's Time Auction Immunity Challenge	7.2	18
15	Textures Elimination Challenge	7.1	17
16	Thai Team Challenge	7.1	15
17	Pressure Test: Helly Raichura's "Pasta Not Pasta"	7.1	17
18	Suburban Mystery Box	7.3	17
19	Sushi Train Immunity Challenge	7.1	16
20	Home Delivery Elimination Challenge	7.1	16
21	Double Twist Team Challenge	7.1	15
22	Pressure Test: Darren Purchese's Passionfruit Pavlova	5.6	21
23	Twist-ery Box	6.9	15
24	Hot N Cold Immunity Challenge + MasterClass	6.3	27
25	Elimination Challenge: World Cuisines and Flavor Pairings	6.2	15
26	Savoury and Sweet Team Challenge	7.0	15
27	Pressure Test: Peter Gunn's Black Box	7.1	16
28	Shannon Martinez's Vegan Mystery Box	7.2	15
29	Comfort Food Immunity Challenge	7.4	17
30	All-In Kingfish Elimination	7.3	15
31	Two-Dish Team Relay Challenge	7.2	15
32	Immunity Pressure Test: Kirsten Tibballs' "Meljito"	7.5	15
33	Memories Mystery Box	7.5	21
34	Fairy Tales Immunity Challenge	8.6	24
35	All-In Elimination: Unusual Flavour Combinations	6.2	15
36	Heat 1: Citrus Invention Test	6.9	14
37	Heat 2: Coskun Uysal's Meat Dessert Challenge	6.9	14
38	Heat 3: Lotto Mystery Box	6.6	14
39	Fast-Track to Top 10 Challenge	6.8	12
40	All-In Pressure Test: Aussie Classics	7.1	14
41	Blind Pairing Team Challenge	6.9	14
42	No-Recipe Pressure Test: Benjamin Cooper's Jungle Curry	6.9	14
43	Smoking Mystery Box	6.9	14
44	Sudden-Death Pumpkin Immunity Challenge	6.8	15
45	Elimination Challenge: Street Food and Fine Dining	6.5	14
46	Golden Mystery Box	6.7	12
47	Time or Ingredients Immunity Challenge	6.7	11
48	All-In Elimination: One-Inch Cube Challenge	6.3	12
49	Two-Dish Everything Box	6.5	11
50	Alphabet Immunity Challenge	6.4	11
51	All-In Elimination: Classics and Novelties	6.4	11
52	Rubik's Cube Mystery Box	6.2	13
53	Two-Dish Lucky Dip Immunity Challenge	6.8	13
54	All-In Pressure Test: Phil Wood's Potato Duchess	7.0	12
55	Terrarium Mystery Box	6.7	11
56	No Rules Challenge	7.7	16
57	All-In Elimination: Four-Course Service Challenge	6.2	14
58	Gordon Ramsay's Mystery Box	6.2	13
59	All-In Elimination: Ordinary or Extraordinary	5.9	12
60	Semi-Final Pressure Test: Martin Benn's Toffee Apple	6.5	17
61	Grand Finale	6.6	22

Season 15 (2023)

7.20 avg 50 episodes 7.7 → 8.5 54 min avg

Big finale
Rebound

Season 15 episodes — IMDb ratings
#	Title	Rating	Votes
1	Premiere	7.7	20
2	15 Minute Meal + Keeping Up With Jamie	7.8	18
3	Secret Flavour Bombs Challenge	7.3	14
4	Shannon Bennett Hugh Allen Immunity	7.5	17
5	Childhood Ingredients Elimination	6.9	18
6	Poh's Mystery Box	7.0	14
7	Emelia Jackson Choux Pastry Elimination	7.0	14
8	Featured Ingredient Team Service Challenge	7.1	15
9	Rotisserie Chicken Immunity Challenge	7.3	15
10	Julie Goodwin Seafood Stew Elimination	7.2	15
11	Biggest Mystery Box Ever	7.1	15
12	Lamington Tower Pressure Test	7.2	15
13	Grazeland Team Service Challenge	7.1	16
14	Sergio Perera Immunity Challenge	7.5	17
15	Overnight Elimination Cook	7.1	15
16	Nostalgic Cereal Mystery Box	6.9	16
17	Messinetta Pressure Test	7.6	16
18	Chinese Restaurant Service Challenge	7.1	14
19	Great Balls of Fire Immunity Challenge	7.4	16
20	Aussie Classic Elimination Challenge	7.2	15
21	3 vs 3 Smackdown Box	6.6	14
22	Smackdown Pressure Test	6.6	15
23	Smackdown Blind Relay Challenge	6.6	15
24	Cook Around the Clock Smackdown	6.8	16
25	Rick Stein Squid Challenge	6.8	12
26	Josh Niland Mystery Box	7.0	12
27	No Recipe Pho Elimination	6.8	12
28	Root Vegetable Service Challenge	6.8	12
29	Condiment Cook-Off for Coles	7.2	12
30	Maggie Beer Elimination	7.3	13
31	Mystery Box Surprise for Judges	7.2	12
32	Mr McGregor's Garden Pressure Test	7.1	12
33	Big Fat Greek Service Challenge	6.9	12
34	Beat the Chef Immunity Challenge	7.0	13
35	Colours Elimination Challenge	6.9	13
36	The Everything Mystery Box	7.0	13
37	Clare Smyth Pressure Test	6.9	12
38	Farm to Table Team Challenge	7.3	14
39	Crunchiest Immunity Challenge	7.0	13
40	Kirsten Tibballs 2 Round Pressure Test	7.4	14
41	Top 5 Open Garden Mystery Box	7.1	14
42	Time Auction Immunity Cook	7.2	14
43	Mexican Food Immunity Challenge	7.3	15
44	3 Course Grains Service Challenge	7.1	16
45	Double Duel for Finals Week	7.5	13
46	Hearts and Souls Mystery Box	7.7	13
47	Peter Gilmore Pressure Test From Memory	8.1	12
48	Keep Up With Curtis Stone Challenge	7.9	13
49	Semi-Final Solo Service Challenge	7.5	16
50	Grand Finale	8.5	20

MasterChef: Australia (2009)

Seasons