The Doctor and Jo find themselves trapped inside an alien peepshow machine which showman Vorg and his assistant Shirna have brought to amuse the populace of the planet Inter Minor. Can they escape Vorg and the ferocious Drashigs?
Jon Pertwee
as The Doctor
Katy Manning
as Jo Grant
Leslie Dwyer
as Vorg
Cheryl Hall
as Shirna
Tenniel Evans
as Major Daly
Ian Marter
as John Andrews
Jenny McCracken
as Claire Daly
Peter Halliday
as Pletrac
Michael Wisher
as Kalik
Terence Lodge
as Orum
