Det. Virgil Tibbs
Chief Bill Gillespie
Officer Sam Wood
Mrs. Colbert
Eric Endicott
Mr. Purdy
Mayor Schubert
Mama Caleba
Courtney
Henderson
Watkins
Packy Harrison
Ulam
Dr. Stuart
Delores Purdy
Harvey Oberst
Shagbag
McNeil (as William C. Watson)
Charles Hawthorne
Shuie
Jess
Fryer
Endicott's Butler
1st Tough
2nd Tough
Clerk
Ralph
Conductor (uncredited)
Engineer (uncredited)
Deputy (uncredited)
Undetermined Role (uncredited)
City Councilman (uncredited)
Ted Appleton (uncredited)
Baggage Master (uncredited)
Philip Colbert - Murder Victim (uncredited)
Viola (uncredited)