Having brought the apparently simple-minded Flora Keiry to London, Professor Lark and John Cornelius uncover the sinister nature of her true identity and realise the authorities must be alerted...
Stars Peter Cushing as John Cornelius, Vincent Price as Professor Curtis Lark, Sandra Clarke as Flora Kiery, Steve Playtus as Kalman Baromek, Frazer Carr as Ian Sanderson, William Eadle as Gulliver, Clifford Norgate as Brigadier Sherman and Michael Harbour as Gwynt.
Written by Rene Basilico from an idea by Robert Holmes.
Producer: John Dyas
First broadcast on BBC Radio 4 in 1977.