Spaceship 0120 sends a distress message as it is pulled towards an unknown planet. Upon landing, the two occupants emerge onto a hot landscape and are attacked by a strange craft which looks like a winged bubble.
The TARDIS arrives near the deserted spaceship. John finds a flare gun inside the craft. The Doctor, John, and Gillian walk towards a giant pyramid in search of the craft's occupants. A bubble ship emerges from the top of the pyramid and the Doctor recognises the pilot as a Klepton. John cracks the dome of the ship with the flare gun, sending it crashing out of control, and they commandeer the craft, flying it into the pyramid.
Inside the pyramid, they are captured by Kleptons, who demand the Doctor assist them in invading Earth. The Doctor refuses and they are imprisoned with the spaceship pilots in a small basket suspended over boiling oil. They will be dumped into the oil if they refuse to assist in the invasion. John ignites the oil, distracting the Kleptons so they can all escape in a pair of bubble craft. The Kleptons are in pursuit, but they have turned off the magnetic beam they used to trap the spacecraft, so it is able to escape the planet. The Doctor, John, and Gillian leave in the TARDIS.
to be added
- This was the second and final appearance of the Kleptons in Doctor Who comic stories. They would next appear thirty-two years later in the novel Placebo Effect.
- The Doctor, John and Gillian previously encountered the Kleptons on an unnamed planet in the 30th century. (COMIC: The Klepton Parasites)