The rich and respected London doctor Roger Mills has invited six of his best friends onto his boat on the Thames - he won't survive the trip.
as Peter Finbow
as Ian Capel
as Avice Lorring
as Tonia Gilmour
as William Garnett
as Christopher Tarrent
as Elisabeth Tufts
as Roger Mills
as Sergeant Birrell
as Sergeant Frazer
as Dr. Parfitt
as Professor Boothby
as Inspector Allen
as Philip Wade
