In the first semi-final, the celebrities are tested on their teamwork.

The celebrities each prepare a two-course meal to be judged by three former finalists.

2010 MasterChef finalist Alex Rushmer challenges the cooks to prepare a vegetarian dish.

Featuring Kem Cetinay, Kadeena Cox, Gavin Esler, Johannes Radebe and Michelle Collins.

The celebs cook for former finalists Sophie Thompson, John Partridge and Vicky Pattison.

Chef Sabrina Gidda challenges the celebrities to cook one of her favourite recipes.

Katie Price, Dion Dublin, Joe Swash, Will Kirk and Melissa Johns face this week's heats.

In this week's quarter-final, the three contestants cook for three previous finalists.

The celebrities cook for Mitch Tonks, one of the UK's top fish specialists.

With Penny Lancaster, Megan McKenna, Melanie Sykes, Patrick Grant and Nabil Abdulrashid.

The contenders cook for former champions Riyadh Khalaf, Kimberly Wyatt and Angellica Bell.

The celebrities must cook an Indian dish from the menu of the Mowgli restaurant chain.

Su Pollard, Rita Simons, Duncan James, Bez and Munya Chawawa face the judges' challenges.

With Craig Revel Horwood, Amar Latif, Crissy Rock and Spencer Matthews.

With Janet Street-Porter, Christopher Biggins, Dev Griffin and Vicky Pattison.

John and Gregg pick the most amazing dishes and challenges from 15 years of the series.

John and Gregg recall celebrities who were pushed to the limits of their culinary skills.

John and Gregg recall some of the best and the worst reviews of the celebrities’ dishes.

John and Gregg recall some of the most entertaining team challenges of the past 15 years.

John and Gregg look back at the contestants’ first experience of a professional kitchen.

John and Gregg relive some of the best and worst food from the heats of previous series.

After five weeks of gruelling challenges, three chefs have reached this year's final.

The semi-finals continue with the last six chefs facing a challenge set by Aldo Zilli.

With eight cooks remaining, it's time for the first semi-final.

The celebrities cook a two-course meal for three former Celebrity MasterChef finalists.