(1 episode)

Lt. Greg Sartain (1 episode)

Sam Raimo (1 episode)

Lester Strickland (1 episode)

Jack Ruby

Michael McGee (1 episode)

Blume (1 episode)

Bertie Slavkin (1 episode)

Josh Thorp (1 episode)

Harry Berman

Peter Huygens (1 episode)

Detective Dan Williams (11 episodes)

EPA Official (1 episode)

Paul Sabotini (1 episode)

Billy Ray Pope (1 episode)

Johnny Sindacco (voice) (uncredited)

Harvey Gruenwald (1 episode)

Detective Tarnowski (2 episodes)

Rafter Mayes

Young Bobby Bartellemeo

Bobby Gastineau

Alton "Hatch" Hatcher (3 episodes)

Jake Booker

Billy

Bart Rainey (1 episode)

Defense Attorney Shuman (1 episode)

Fergus Carroll

Fergus (1 episode)

Tanner

(1 episode)

Detective Bobby Zito

Morgan

Dr. Goddard / The Breath Taker

Conan (voice)

Cash

Himself

(1 episode)

Michael

Ned Zed (1 episode)

Cal

Curley

Colin Phipps

Mike Sawyer

Hutchinson

3-D

Mike Lafebb

Charley Bowdre

Don Carney

Jerry Mitchell

Wildman

Dakota

Billy Tessio

Jonathan

Andy Grainger

Jonathan (1 episode)

3-D

Roger Despard

(1 episode)

Rick Messina (3 episodes)

Jeff

Aaron Davis

Doug