John Cassavetes as Axel Nordmann

Sidney Poitier as Tommy Tyler

Jack Warden as Charles Malik

Kathleen Maguire as Ellen Wilson

Ruby Dee as Lucy Tyler

Val Avery as Brother

Robert F. Simon as Mr. George Nordmann

Ruth White as Mrs. Nordmann

William A. Lee as Davis

John Kellogg as Detective

David Clarke as Wallace

Estelle Hemsley as Lucy's Mother

Roy Glenn as Stevedore (uncredited)