Don Knotts as Luther Heggs

Joan Staley as Alma Parker

Liam Redmond as Kelsey

Dick Sargent as George Beckett

Skip Homeier as Ollie Weaver

Reta Shaw as Mrs. Halcyon Maxwell

Lurene Tuttle as Mrs. Natalie Miller

Philip Ober as Nicholas Simmons

Harry Hickox as Police Chief Art Fuller

Charles Lane as Whitlow

Jesslyn Fax as Mrs. Hutchinson

Nydia Westman as Mrs. Cobb

James Millhollin as Mr. Maxwell

George Chandler as Judge Harley Nast

Robert Cornthwaite as Springer

Ellen Corby as Neva Tremaine

Sandra Gould as Loretta Pine

Eddie Quillan as Elevator Operator

Burt Mustin as Mr. Deligondo

Hope Summers as Susanna Blush

Hal Smith as Calver Weems

Al Checco as Gaylord Patie

J. Edward McKinley as Mayor Carlyle Preston

Everett Greenbaum as Man Saying 'Attaboy Luther' (voice)

Jim Boles as Billy Ray Fox

Lovyss Bradley as

Ruth Thom as Occult Clubwoman (uncredited)

Walter Bacon as Man at Picnic