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"The tetraps are nobody's pets and you'd be wise not to forget it"
Violently wrenched out of time, the TARDIS is brought crashing down onto the planet Lakertya by the villainous Rani. In the maelstrom, the Doctor is forced to regenerate. Imprisoning the Doctor in her stronghold, the Rani seizes upon his vulnerable state. By impersonating his friend Mel, the Rani deceives the unwitting Doctor into helping her achieve her audacious plan. Just what is she up to? Why has she enslaved Albert Einstein and a host of geniuses? And as an asteroid composed of Strange Matter approaches Lakertya, can a weakened Doctor save the universe when he has little idea of who he really is?
The Doctor: Sylvester McCoy
Melanie: Bonnie Langford
The Rani: Kate O'Mara
Ikona: Mark Greenstreet
Faroon: Wanda Ventham
Beyus: Donald Pickering
Producer: John Nathan-Turner
Director: Andrew Morgan
Scriptwriter: Pip and Jane Baker