Professor Lark and John Cornelius reveal to Flora's MP father, Ian Sanderson, that he himself is a mutant being - manipulated by some unidentified Controller.

Shocked and horrified, Sanderson helps them trace the organization...

CAST:

John Cornelius .... Peter Cushing
Curtis Lark .... Vincent Price
Sir Gordon MacLeodan .... Richard Hurndall
Lady MacLeodan .... Joan Benham
Ian Sanderson .... Frazer Kerr
Donald Scholar .... Henry Stamper
Manson .... Andrew Sear

Written by Rene Basilico from an idea by Robert Holmes.

Producer: John Dyas

First broadcast on BBC Radio 4 in 1977.

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