Gee 'Gee-Pop' O'Brien (8 episodes)

Robert (1 episode)

Robert Silas (4 episodes)

Guy Dan (1 episode)

Dog with Bucket Hat (voice) (12 episodes)

Alan Burke (1 episode)

John Mitchell

Jonah Vogelbaum (3 episodes)

Tommy

John 'Gip' Gipsky

Roger Reinhart (1 episode)

Bernie Segal

Victor Moretti (1 episode)

John McCleary

Councilman Slessinger (1 episode)

Walt

Aidan Moran (10 episodes)

CIA Director Dennis Ellerman (2 episodes)

Charles Eddis (1 episode)

Bruce Butler (1 episode)

Carmine Falcone (19 episodes)

Mitch Valentino

Vincent Quinn (1 episode)

Ross Garrison (10 episodes)

Rodrigo Borgia (38 episodes)

Oliver Cardiff (1 episode)

Jerry

Dysert

Patrick 'Paddy' Doyle (7 episodes)

Bill Cowley (2 episodes)

Walter Kendrick (10 episodes)

Jim Boone

Phillips

Lt. William A. Rawls

Coach Colasanti

Hayden Mills (1 episode)

Eugene Kale (1 episode)

Chief MacSwain

John Davidson

Tim Grace (1 episode)

Lieutenant Cheney (1 episode)

Father Pete

Dr. Baron

Paul Finnegan

Dad

Driver

Judge Slater (2 episodes)

Henderson

William Rawls (60 episodes)

Roy Markham (1 episode)

Stephen Leeds

Ralph (1 episode)

Admiral Langlett

Edward Galson (1 episode)

Detective Michael Finley (1 episode)

Testifying Detective (1 episode)

Officer Michael Finlay (1 episode)

Mike Mollinax (1 episode)

Dan Lattimer (1 episode)

Munch's Informant (1 episode)

Rod Franklin (1 episode)

William Rand (1 episode)

Russian Godfather

Carl Deraad (10 episodes)

Ralph Gigante Sr.

Cain's Friend

Supervisor Hartley

Lassaro's Aide

Andy Berg

U.S. Senator

Airplane Captain / White House Representative (voice)

Plainclothes Cop 2

Mr. Riggs (1 episode)

(1 episode)

Lenaris Holem (1 episode)

Construction Foreman

Bailiff (2 episodes)

Sergeant Frank Gottlieb (1 episode)

Mr. Stephens (1 episode)

Howard Ridgeway (1 episode)

Jim Gilles (1 episode)