Robert Blake as Perry Smith

Scott Wilson as Richard 'Dick' Hickcock

John Forsythe as Alvin Dewey

Paul Stewart as Jensen

Gerald S. O'Loughlin as Harold Nye

Jeff Corey as Mr. Hickock

John Gallaudet as Roy Church

James Flavin as Clarence Duntz

Charles McGraw as Tex Smith

Will Geer as Prosecutor

John McLiam as Herbert Clutter

Ruth Storey as Bonnie Clutter

Brenda Currin as Nancy Clutter

Vaughn Taylor as Good Samaritan

Duke Hobbie as Young Reporter

Guy Way as Prison Guard

Sheldon Allman as

Sammy Thurman as

Raymond Hatton as

Sadie Truitt as

Myrtle Clare as

Ted Eccles as

Al Christy as

Don Sollars as

Harriet Levitt as

Rhonda Fultz as

Mary Linda Rapelye as