The Gerry Anderson Randomiser

Zelda lures the Terrahawks to Jupiter's moon Callisto by ransacking a listening post there. Once they arrive, they find themselves being stalked by the fearsome Sporilla.

A man with E.S.P. knowledge of SHADO is co-opted by the aliens.

Mitch switches places with a musical gorilla.

Outraged by Marina's defection to the WASP, Titan plots revenge by having Agent X-2-Zero to deliver a toxic plant to her father Aphony.

A new drug, HE-11 (also known as "Flash"), has arrived on the streets of Demeter causing spontaneous combustion in its users. While Brogan and Haldane visit Interchem, the pharmaceutical company which originally developed the drug, Orrin and Romek run into trouble when Interchem's chief chemist, Pola Vad Moonacki, is kidnapped.

The Lunar Controller declares the Moon neutral in the "war of nerves" between Earth and Mars. Dispatched to investigate suspicious activity on the satellite's far side, Scarlet, Captain Blue and Lieutenant Green make a shocking discovery.

Mr and Mrs Space Spy issue a fake distress call in an attempt to trick Zodiac into handing over a convict in transport.

(Intro special guest: Beth Chalmers)

Harry is the victim of a car crash. But was it an accident?

A message on Sproggle’s radio draws the Paradox crew to the Mountain of Morg on the planet Zark to search for the Lavender Compass that will lead them to Lavender Castle. But the caves of Morg are laced with deadly traps and the travellers' every move is being watched by a sinister figure who wants the Compass for himself.

Strange events befuddle the Alphans as they approach the planet Piri. When exploring its lifeless surface, Koenig encounters the seductive servant of the mysterious Guardian of Piri. She offers the wayward Alphans a life of peace and perfection. Realising the deadly truth behind the peace of Piri, Koenig struggles to free his people from the Guardian's influence.