(1 episode)

(1 episode)

(1 episode)

Self (1 episode)

Dave (1 episode)

Cole Younger

McGraw (42 episodes)

Inspector Ed McCook (1 episode)

Vic Chambers (1 episode)

Jim Todd (2 episodes)

Sam Walston (1 episode)

Capt. Amos Winfield

William E. Wiley

Self - Announcing Next Week's Show

Det. Lt. Pringle

Walter (1 episode)

Walter Davidson (1 episode)

Joe Winters (1 episode)

Ben Dana (1 episode)

Prof. Sam Bastion

Stanley E. 'Stan' Fabian

Casey Martin

Police Capt. Tom Lynn

Brad Cantrell

Ennis Hawkes

Bento Hermany

Lt. Cmdr. Grayson

Sgt. Fletcher

Randy Stone (1 episode)

McGraw (1 episode)

Capt. Jim Barr (1 episode)

Clark (1 episode)

Walter Neff (1 episode)

Uncle Charlie (1 episode)

Sgt. Charlie Baker

John E. 'Johnny' Merrick

Tom Brennan

Gilbert Bowen

John Webber

Rogers Hornsby

Lt. Col. Steve L. Corbett

Frank Lovejoy

Walter Donaldson

Maj. Blackford

Matt Cole

Matt Cvetic

Howard Tyler

Sgt. Pete Bell

Bob Duffy

Doc

Brub Nicolai

Sergeant Mingo

Mark Lorimer