Andrew Goodman (21), Kate Clarke (18), Rob Smith (31), Liz Cummins (28), Paul Griffiths (29), Sylvie Lewis (20) - S1.E13

The Thirteenth and Final Episode of Season 1. After competing in all four Zones, the remaining contestants entered the Crystal Dome, a 16-foot-high (4.9 m) replica of the 'time crystals' surrounded by a seven-foot circular moat and entered by a 3-foot-wide (0.91 m) 'drawbridge' which was hydraulically retracted once the team were inside. Similarly, one of the Dome's triangular panels was hydraulically opened and closed to let the team enter, then lock them inside. Inside the Dome, gold and silver banknote-sized 'tokens' made of foil were blown around from beneath the wire mesh floor by six huge fans mounted on a slowly rotating giant turntable, leading to O'Brien's catchphrase, occasionally delivered in a cod American accent: "Will you start the fans, please!" or Tudor-Pole's various elaborate intros, for example "Let the mighty winds blow!" In the Dome, and after the fans and turntable were up to speed with all the tokens swirling around, the team's aim was to grab the tokens from the air and post them into a roughly house brick sized clear plastic container mounted at waist height on the outside of one of the dome's panels. Tudor-Pole called it The Cosmic Pyramid, while O'Brien termed it The Letterbox. The container had a pneumatically-operated door on the inside, marked with a red saltire-shaped cross, which opened when the collection time started and closed when time was up.