A serial killer who drains his victims for blood is on the loose and London police follow him to a house owned by an eccentric scientist.
Vincent Price
Christopher Lee
Peter Cushing
Judy Huxtable
Alfred Marks
Michael Gothard
Anthony Newlands
Peter Sallis
David Lodge
Uta Levka
Christopher Matthews
Judy Bloom
Clifford Earl
Kenneth Benda
Marshall Jones
Amen Corner
Yutte Stensgaard
Julian Holloway
Nigel Lambert
Kay Adrian
Rosalind Elliot
Lee Hudson
Olga Linden
Gertan Klauber
Deirdre Costello