Episode 2 (S15E02)

The final four contestants tackle two additional cooking challenges in their quest for a spot in the semi-finals. They are divided into pairs for a teamwork exercise, with one team tasked with perfecting John Torode's dim sum while the other focuses on his spiced duck noodle broth. Next, the celebrities' collaboration is put to the ultimate test during their inaugural Mass Catering Challenge, where they must prepare lunch for more than 100 staff members at Acton Works, the main facility for servicing and enhancing London Underground trains.