"A Scotland Yard Detective must investigate a series of murders perpetrated by a giant blood-sucking moth that can take human form."
Peter Cushing
as Detective Inspector Quennell
Robert Flemyng
as Dr. Carl Mallinger
Wanda Ventham
as Clare Mallinger
Glynn Edwards
as Sgt. Allan
Kevin Stoney
as Granger the Butler
Vanessa Howard
as Meg Quennell
David Griffin
as William Warrender
Roy Hudd
as Morgue Attendant
William Wilde
as Frederick Britewell
Simon Cain
as Clem Withers
Russell Napier
as Landlord
John Paul
as Mr. Warrender
Leslie Anderson
as Coachman Joe Trager
David Lyell
as Student with Toy Spider
Drew Russell
as Constable Smith
Robert Cawdron
as Chief Constable
Kenneth Colley
as James
Roy Evans
as 2nd Porter
Vernon Sewell
Director
Peter Bryan
Screenplay
Paul Ferris
Original Music Composer
Wilfred Woods
Art Direction
Freddie Vale
Casting
Henry Montsash
Hairdresser
Ricky Coward
Production Manager
Roger Dicken
Special Effects
Marie Feldwick
Wardrobe Designer
Conductor
Arnold L. Miller
Producer
Tony Tenser
Executive Producer
Stanley A. Long
Director of Photography
Howard Lanning
Editor
Rosemarie McDonald Peattie
Makeup Artist
George Pollard
Assistant Director
Eve Wilson
Continuity
Pat O'Donnell
Production Secretary
Norman Jones
Camera Operator
Jim Alloway
Focus Puller
Alan Hogben
Sound Mixer
Mike Tucker
Boom Operator
Len Harvey
Construction Manager
Freda Pearson
Set Dresser