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.

The Investigator, an omniscient being from another galaxy, has come to Earth to rid it of evil and corruption. To assist him, he has recruited two young Americans, John and Julie , whom he has miniaturised and given special powers. In a cave on Malta, the Investigator gives John and Julie their first assignment: they are to foil crooked entrepreneur Stavros Karanti's plan to steal a priceless Raphael painting from St John's Cathedral in Mdina.

The Protectors investigate a runaway and discover she is involved with an international drug smuggling operation.

Three weeks after losing contact with Elysium Base on Mars, a team consisting of Captains Scarlet and Blue, Destiny and Harmony Angels, and Doctor Gold are sent to find out what happened to the crew. On arrival, they realise it is a Mysteron trap and that they are under attack from an titanium armour-plated research robot named Remote Acquisition Technology (RAT) which carries lasers and a diamond-tipped saw. Under Mysteron control, the RAT has become the ultimate killing machine.

Joe tries to find out whether the crash of a prototype spaceplane was an accident or sabotage.