John Partridge, Michelle Ackerley, Chizzy Akudolu, Keith Allen, Clara Amfo, Martin Bayfield, Jay Blades, Frankie Bridge, Gemma Collins, Josh Cuthbert, Carol Decker, Anita Harris, Jean Johansson, Zoe Lyons, Spencer Matthews, Lisa Maxwell, Monty Panesar, Stella Parton, AJ Pritchard and Stef Reid.

John Partridge, Spencer Matthews, Frankie Bridge, Jean Johansson and Anita Harris take part in the culinary contest, whipping up dishes from mystery ingredients - including lamb rump, whole mackerel, mozzarella, aubergine, apricots and filo pastry - to impress John Torode and Gregg Wallace. Anita, John and Jean then head to Novikov, an Italian restaurant in Mayfair, London, while Spencer and Frankie are sent to Baluchi, a Pan-Indian eatery that showcases modern dishes with authentic Indian flavours.

The heats continue with the new Pairs Challenge, which sees the remaining candidates split into two teams of two, each tasked with cooking the same dish - identical in both appearance and flavour. The contenders are then sent out to Chessington World of Adventures to prepare lunch for over 100 staff, having to cater in volume for various tastes. Back at headquarters, the four must each cook a faultless two-course meal that will not only be judged by John Torode and Gregg Wallace, but also by 2017 finalists Dev Griffin and Ulrika Jonsson, and reigning champion Angellica Bell.

The culinary contest continues as actress Chizzy Akudolu, cricketer Monty Panesar, Paralympian Stefanie Reid, comedian Zoe Lyons and reality star Gemma Collins enter the Masterchef kitchen. They begin with a test of imagination and creativity in the Mystery Box challenge, before splitting into groups to cook for paying customers in a restaurant kitchen. In the final round, the competitors prepare a two-course meal of their own design to impress judges Gregg Wallace and John Torode for a place in the next round.

The heats continue with the Pairs Challenge, which sees the remaining candidates split into two teams of two, each tasked with cooking a dish identical in both appearance and flavour. The contenders are then sent out to British Airways Global Learning Academy to prepare lunch for over 100 staff, having to cater in volume for various tastes, both meat-based and vegetarian. Back at headquarters, the four must each cook a faultless two-course meal that will not only be judged by John Torode and Gregg Wallace, but also by former champions Lisa Faulkner and Kimberly Wyatt and finalist Rylan Clark-Neal.

The culinary contest continues as actress Lisa Maxwell, Strictly Come Dancing professional AJ Pritchard, furniture restorer Jay Blades, radio presenter Clara Amfo and country singer Stella Parton - sister of Dolly - demonstrate their culinary prowess. They begin by making a dish from the ingredients in the Mystery Box, which this week includes pork loin, trout, cauliflower, raspberries and white chocolate, before cooking for paying customers in a restaurant kitchen. In the final round, they prepare a two-course meal of their own design to impress judges Gregg Wallace and John Torode, hoping it will be enough to see them through to the next round.

The four remaining celebrities face three more culinary challenges, as they battle for a place in the semi-finals. The contestants are split into two teams and sent out on their first mass catering assignment at the Royal Veterinary College in Hertfordshire. There, they must make lunch for more than 100 members of staff and students, using an array of ingredients including diced lamb, hake fillets and salmon, as well as a range of fruit and vegetables. Back in the kitchen, the celebs prepare a two-course meal that will be judged by former contestants Alexis Conran, the Rev Richard Coles and Andi Peters.

The contestants take part in the first of the semi-finals and face their toughest challenge yet as they cook for 90 staff and volunteers at the Black Country Living Museum in Dudley, West Midlands. In specially constructed marquee kitchens, the celebrities are split into two teams and must create dishes from ingredients including pork belly, beef rump, mackerel and whole haddock. Then it's back to the MasterChef Kitchen to face an Invention Test, after which more will be going home.

The last of the semi-finals sees the remaining celebrities tasked with making the pie of their choice, sweet or savoury, from a wide range of ingredients. Next, they have to prepare a five-course lunch in celebration of over 40 years of the BBC's Antiques Roadshow, cooking a menu created by top chef Paul Askew. Then, it's back to the MasterChef kitchen, where they must each create one exceptional dish inspired by someone they love or admire. For the cook who fails to make the grade, their competition will be over. The remaining four will go through to Finals Week.

The battle for the Celebrity Masterchef title continues, with the four remaining hopefuls serving up two sweet and two savoury items for afternoon tea. But adding to the pressure, they will not only have to impress John Torode and Gregg Wallace but also leading pastry chef Eric Lanlard. Then they must cook two dishes of their own design for a trio of restaurant critics, at the end of which only the three best will still be in the running for the title.

The three remaining celebrities take part in the 2018 final. Their penultimate challenge is the toughest and most daunting of the competition - The Chef's Table. This year it will be hosted by critically acclaimed chef, Bryn Williams. The trio will be working out of his new restaurant, Bryn Williams at Somerset House, cooking for an exceptional gathering of some the best chefs in the country. Back at base, the three must cook and present a faultless three-course meal for judgement by John Torode and Gregg Wallace, in what is their last chance to prove they have what it takes to be crowned champion. Last in the series.