1Heat 1
In this heat, chefs are challenged to make a classic French dessert and a blue steak.
2Heat 2
In this heat, skills tests feature an omelette Arnold Bennett and filled brandy snaps.
3Quarter Final 1
The first quarter-final challenge is to create a dish from a selection of ten ingredients.
4Heat 3
In the skills test, the chefs make a buck rarebit and joint a rabbit.
5Heat 4
Three chefs prepare scallops in different ways: in a mousse, sauteed and as a tartare.
6Quarter Final 2
The chefs cook for some of the country's most discerning restaurant critics.
7Heat 5
The chefs must fillet a sea bream and make the perfect watercress soup in the skills test.
8Heat 6
Monica tests the chefs' butchery skills when she asks them to debone a pig's trotter.
9Quarter Final 3
The chefs' pastry skills are tested in the quarter-final round.
10Heat 7
The last week of the heats kicks off with six new chefs.
11Heat 8
The chefs prepare langoustines and cook high-end burgers in the final heat.
12Quarter Final 4
The week's six best chefs serve up a two-course menu to three restaurant critics.
13Episode 13
The 12 best chefs cook off against each other in the MasterChef kitchen.
14Episode 14
The chefs must work together to serve an exceptional dinner at London's Law Society.
15Episode 15
The chefs travel to Lord's Cricket Ground to cook a fine-dining menu for Mike Gatting.
16Episode 16
Two semi-finalists cook alongside joint Professional MasterChef champion Anton Piotrowski.
17Episode 17
The semi-finalists cook for Tom Kitchin at his Michelin-starred restaurant in Edinburgh.
18Episode 18
The last three semi-finalists work with chef Lisa Allen at the Michelin-starred Northcote.
19Episode 19
It's finals week. After one goes out in the invention test, the chefs cook for their idols
20Episode 20
The finalists travel to the medieval city of Alba in the Piedmont region of northern Italy
21Episode 21
It's the final. Who will be crowned Professional MasterChef Champion 2015?