The Gerry Anderson Randomiser

The Terrahawks find a teddy bear-like alien adrift in a space capsule and take him back to Hawknest. However, he is actually one of Zelda's monsters and begins to wreak havoc in the base.

With special guest Stephanie Laing

Disappearances of robots are linked to Professor Himber. With Robert missing, Zodiac and Matic travel to Planet 82 only to be put on trial by the professor – who is ruler of his kidnapped robot race.

Special guest: Matt Richardson

The Alphans are visited by a bizarre spacecraft, whose request for supplies hides a deeper purpose. The ship, Gwent, is found to be sentient, the attempt of a vain alien genius to live forever. Powerful, unstable and craving companionship, Gwent intends for Koenig, Helena and Bergman to replace its aged, dying creator.

With special guest Wendy Wason.

In the small town of Ragnarok in Alaska, which the Mysterons have destroyed and replicated, Scarlet and Blue are captured and forced to help mine for an ancient meteorite bearing a spore that can kill all life on Earth.

A pair of convicts break out of a Canadian jail and threaten to kill the country's prime minister unless they are given a generous ransom.

A little French girl escapes her tyrannical guardian in a crate of wine bound for Black Rock.

A scientist disappears with a deadly biological weapon. The first the Protectors know of this is when the KGB breaks into Harry's flat to tell them.

Lord and Lady Hazlewell, their associate Spiker and ex-convict Mullins meet at Hazlewell Manor in a conspiracy to print forged US dollar bills. The Hazlewells inherited one of two counterfeiting plates from their late father; when the second plate is revealed to be hidden at Greenacre Farm, the Hazlewells, Spiker and Mullins turn on each other in a race to claim the prize. Unwin and Matthew set out to beat them to it.

When their city on Mars is attacked by human astronauts under the command of Spectrum's Captain Black, the Mysterons vow to destroy all life on Earth. The aliens' first objective is the assassination of the World President.

The world's tallest tower catches fire following an explosion in the car park and International Rescue are called to rescue a family trapped in the basement, which they can accomplish only with an experimental cutting gas ("Oxyhydnite") that previously rendered Scott and Virgil Tracy unconscious during testing.