Diagnosis: Murder

Three or four drops a day can relieve the patient ...of her fortune

A psychiatrist plots to murder his wife so he can be with his mistress, but his wife mysteriously disappears before he can carry out his plan.

Christopher Lee

Dr. Stephen Hayward

Jon Finch

Lomax

Judy Geeson

Helen

Dilys Hamlett

Julia Hayward

Tony Beckley

Sgt. Greene

Jane Merrow

Mary Dawson

Colin Jeavons

Bob Dawson

David Trevena

Johnson

Adrian Cairns

Morgan

Daphne Neville

Nurse Fisher

Hugh Smith-Marriott

Dr. Chapman

Hubert Tucker

Ronalds

David Langford

Gray