A couple attempts to unravel a sinister plot within the English countryside estate of a dying man who has gathered an eclectic and notable group of house guests.
Katharine Ross
as Margaret Walsh
Sam Elliott
as Pete Danner
Roger Daltrey
as Clive Jackson
John Standing
as Jason Mountolive
Ian Hogg
as Harry
Margaret Tyzack
as Nurse Adams
Charles Gray
as Karl Liebnecht
Lee Montague
as Jacques Grandier
Hildegard Neil
as Barbara Kirstenburg
Marianne Broome
as Maria
Patsy Smart
as Cook
William Abney
as Butler
