The Gerry Anderson Randomiser

Pedro and Fernando set a fire on the outskirts of town to lure Tex away. The bandits aim to rob the bank while Tex and the other townsfolk fight the fire.

Approaching an inhabited planet, the Alphans are suddenly pounced upon by warships. In an unprovoked attack, Moonbase Alpha is devastated by Earth-style Hawk fighters. With 128 dead and Alpha unable to sustain life, Koenig and Helena appeal to the aliens for mercy. The aliens proclaim the Earthmen to be an invading virus, with no right to exist.

In a remote diner in Phoenix, Arizona, Spectrum flight engineer Xander Story makes contact with two Mysteron agents. Story agrees to destroy Spectrum's Skybase in return for the aliens' promise that they will halt their war on mankind – he accepts a fusion bomb in a briefcase and also a large payment. Captain Scarlet gatecrashes the meeting but is shot and killed. Knowing that his body will regenerate, the Mysterons try to engineer Scarlet's total destruction in a massive explosion. Captain Blue finds his devastated corpse and takes it to Skybase. Doctor Gold finds that Scarlet's injuries are too severe, and with no sign of the retrometabolisation process taking place, he pronounces the agent dead. While Destiny and Blue grieve for their lost friend, Story plants the bomb on Skybase, set to an hour's delay. In sickbay, Scarlet regains consciousness, only to find that no one can see or hear him, and that he has somehow become intangible, yet somehow he must warn Destiny and Blue about the bomb.

When the Ocean Pioneer tanker inexplicably explodes, Brains investigates the cause. With some help from Lady Penelope, he discovers it to be a chemical reaction between the cargo of liquid alsterene and OD60, which is found in the sea. International Rescue set out to save the crew of the ill-fated Ocean Pioneer II.

A film director hires the Protectors to investigate when copies of his latest film are stolen and a ransom is demanded.

Unwin and Matthew investigate what appears to be a case of sabotage when the AquaTank, a new military robot of the World Army, develops a mechanical fault. As NATO officials attend a demonstration of the AquaTank's capabilities, suspicion falls on Captain Mitchell when he instructs computer expert Professor Graham to program the tank to fire on the officials' bunker.

Fernando and Pedro try to get arrested so they can spend the night in jail. The pair wants to dig underneath the jailhouse and on into the bank to rob it.

A SHADO pilot believed dead suddenly turns up alive – much to a SHADO operative's suspicion.

When Surface Agent X-2-Zero frames a navy captain for a sabotaged torpedo test, it is up to Troy to clear the man's name.

By a trillion to one chance, the Paradox discovers Roger’s old Starfighter, the Firefly, adrift in space. Isambard goes aboard to effect repairs, but it is the inexperienced Sproggle who ends up in the cockpit of the Starfighter when Dr. Agon’s Mammoth Machine closes in on the Paradox!