'Enigma' by Phil Ford

When Spectrum detects a massive unidentified spaceship leaving Mars on a collision course for Earth, Colonel White immediately scrambles the Angels to intercept. The interceptors’ missiles have no effect, and it looks like the Mysterons have targeted Skybase; however, at the last possible moment, the huge spaceship changes course and lands in the Northern Territories of Australia. Captains Scarlet, Blue, Ochre and Grey set off to investigate and soon arrive in the Outback, where the colossal Mysteron ship has settled. When the Spectrum party approaches the vessel they are suddenly teleported inside, finding themselves in a surreal and astonishing environment that no human has ever seen before. But as the quartet study their surroundings they unwittingly become the subjects of the Mysterons’ latest round of mind games…

Wayne Forester (Captain Scarlet), Robbie Stevens (Captain Blue / Captain Grey), Mike Hayley (Colonel White), Jules de Jongh (Lieutenant Green), Julia Brahms (Captain Ochre), Nigel Plaskitt (Captain Black), Emma Tate (Destiny Angel), Mike Hayley (Voice of the Mysterons)

Directed by Dominc Lavery
Executive Producer Gerry Anderson

TX:
UK (CITV):
17th September 2005 - shown in two parts within 'Ministry of Mayhem'

Notes:
*Featuring Captain Scarlet, Captain Blue, Captain Grey, Captain Ochre, Colonel White, Lieutenant Green and Destiny Angel