Ralph Richardson
Prof. Heatherville
Pemeran
Top Billed Cast
Raymond Huntley
Prof. Laxton-Jones
John Laurie
Dr. McVitie
?
Ernest Jay
Dr. Dainty
David Tomlinson
Mr. Watlington
Finlay Currie
Sir Duncan Wills
?
Norman Webb
Dr. Wainwright
Michael Hordern
Lt. Cmdr. Lowther
Pamela Matthews
Mrs. Watlington
?
Joan Haythorne
Mrs. Laxton-Jones
Joan Young
Mrs. McVitie
?
Ann Wilton
Mrs. Dainty
Richard Attenborough
Jack Arnold
David Hutcheson
Squadron Leader Sowerby
Patrick Waddington
Group Capt. Aspinall