Glynis Johns as Mrs. Amworth

Ronee Blakley as Simone Maglore

Keir Dullea as Dr. David Priestly

John Hurt as Lt. George Simmonds

Graham Crowden as Collins, the Butler

Cec Linder as Dr. Paul Carstairs

Charles Gray as Santander

Jenny Runacre as Jenny Santander

Pol Pelletier as Miss Smith

Derek Francis as Benson

John Phillips as Francis Urcombe

Ed Devereaux as The Ferryman

Pip Miller as David