Martin Friend

Kryten finds a matter transporter and whisks the crew off to Waxworld.

Snowy, an albino elephant, is stolen from Noah's Ark, a specialist zoo run by Noah Marshall. Mrs Gale's experience of living in Africa puts her on the case.

JP Spagge is an international criminal mastermind and The Avengers have a plan to trap him by posing as thieves.

The Doctor and Sarah are desperate to warn UNIT of the Kraal's invasion, but nobody will believe them. The Kraal's release their android duplicates, including one of the Doctor.

The Kraals intend to invade Earth by stowing away aboard Crayford's rocket as it returns home. The Doctor learns Styggron's plan is to wipe out all life on the planet.

The TARDIS arrives back on Earth but all is not as it seems as the Doctor and Sarah are attacked by mysterious space suited figures and discover that the dead are walking.