Louis Jourdan
— Dr. David Sorell
Lynda Day George
— Barbara Anholt (as Lynda Day)
Carroll O'Connor
— Myles Donovan
Bradford Dillman
— Paul Varney
Wilfrid Hyde-White
— Harry Snowden
Marsha Hunt
— Mrs. Varney
Katherine Woodville
— Ingrid Dorne (as Katharine Woodville)
Harry Davis
— Mr. Wyant
Ivor Barry
— Lecturer
Jeanne Buckley
— Miss Bamett
Robert Sampson
— First Party Guest
Lyn Peters
— Second Party Guest
Susan Brown
— Third Party Guest