David Wickes
Director
John Kershaw
Writer
Alfred Burke
Frank Marker
Michael Culver
Dr. Pembroke
Esmond Knight
Dr. Stowe
Ann Curthoys
Felicity
Beryl Cooke
Receptionist
Trevor Adams
Farmer
Ronald Govey
Investigator
Elisabeth Sladen
Policewoman
David Ellison
'Freezer' Man
Ray Smith
DI Percy Firbank
