Nancy Coleman
— Ann Dwire, alias Ann Mason
Michael O'Shea
— Steve Fuller
Sheldon Leonard
— Fred Stalk
Peter Whitney
— Joker
Emory Parnell
— True Dawson
Pierre Watkin
— Ralph Borden
Frank Reicher
— Pop, apartment concierge
Cay Forester
— Sally Donahue (as Cay Forester)
John Hamilton
— Dr. Chalmers
Richard Irving
— Protest Rally Orator
Carole Donne
— Beth Taffel, Borden's secretary
Jimmy Clark
— Joe Donahue
William Gould
— Mr. X