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

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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