Take One False Step

William Powell Andrew Gentling

Shelley Winters Catherine Sykes

Marsha Hunt Martha Wier

Dorothy Hart Helen Gentling

James Gleason Captain Gledhill

Felix Bressart Professor Morris Avrum

Art Baker Henry Pritchard

Sheldon Leonard Detective Pacciano

Howard Freeman Dr. Markheim

Houseley Stevenson Montgomery Thatcher

Paul Harvey Mr. Arnspiger

Francis Pierlot Dr. Herbert Watson

Jess Barker Arnold Sykes

Mikel Conrad Freddie Blair

Vangie Beilby Old Lady at Lecture (uncredited)

Marjorie Bennett Waitress (uncredited)

Leonard Bremen Truck Driver (uncredited)

Paul Brinegar Reporter (uncredited)

Frank Cady Reporter (uncredited)

Edmund Cobb Policeman (uncredited)