The TARDIS arrives on the planet Dulkis where the Doctor, Zoe and Jamie decide to have a quiet holiday. Only to find the Evil Dominators and their robotic slaves, The Quarks have arrived on a radioactive island, where they plan to detonate a bomb in the planet's core, which will turn the entire planet as source of radioactive fuel for their invasion fleet.
Quest roles:
Ronald Allen(Ralph Cornish), Arthur Cox(Cully), Philip Voss(Wahed), Malcolm Terris(Co-Pilot), Nicolette Pendrell(Tolata), Gary Smith(Quark), Freddie Wilson(Quark), Kenneth Ives(Toba), Felicity Gibson(Kando), Giles Block(Teel), Johnson Bayly(Balan), John Hicks(Axon Boy), Sheila Grant(Jane Leeson)