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!

Zelda dispatches Yung-star and a new monster, Lord Tempo, to find the location of Hawknest. While traveling back in time to avoid Spacehawk, they pick up King Richard III.

No longer under the Mysterons' control, but retaining their power of "retro-metabolism", Captain Scarlet joins Spectrum's operation to protect the aliens' next target – the Director General of the United Asian Republic.

The naughty children playing in Mr. Bumble-Drop's garden tie their toys to the kite strings. Suddenly, a strong wind comes along and blows all of the toys away, as well as Mr. Bumble-Drop's poodle, Pom-Pom, who tries to save them. The children blame Bumbledrop and vow never to return, so the lonely old man decides to make a mechanical boy to keep himself company. Four hours later, Torchy springs to life and uses the magic beam on his hat to locate the lost toys on a twinkling star. The next morning, Mr. Bumble-Drop builds a rocket of cardboard, and Torchy flies off to retrieve the lost puppy and toys.