Julian Anthony (20), Alison Hayward (30), Michael Kempster (20), Kate Jackman (23), Christina Prodrumou (19), Philip Marsh (23) - S1.E10

The Tenth Episode. The chosen team member would be sent into a chamber to play a game, and their team-mates could advise them from outside (except in specific mental games where the team would be instructed not to confer, although general encouragement could still be shouted in). Successfully solving the puzzle would release a crystal.