Joe Regalbuto

(13 episodes) as Frank Fontana

as Mitch

(1 episode) as Dan O'Grady

as Bill

(1 episode) as Bill Bradford

(1 episode) as Self

(1 episode) as Commander Marks

(1 episode) as Colonel George Ellis

as Dr. Norm Glazer

(1 episode) as Sal

(2 episodes) as Frank Fontana / Bull / Editor (voice)

(1 episode) as Harvey Hall

as Stan Geffen

(1 episode) as Donnie Mancuso

as Det. Mark Browning

as Paul Summerton

as Tony Blanchard

as Fuller

as Tom Janssen

as Charlie Capute

as Grady Dolin

(247 episodes) as Frank Fontana

(1 episode)

(1 episode) as Steven Capstone

as Marvin Baxter

as Dad

(1 episode) as Arthur Prescott

(1 episode) as Elliott Fusco

as Dr. Dan

(1 episode) as Jeremy

(13 episodes) as Norman Tuttle

(1 episode) as Merle

as Tom Peterson

as Peter Breeze

as Norman Tuttle

(1 episode) as Bert Felch

(2 episodes) as Don

as Arthur Cooms

as Jeff Marisol

(1 episode)

(5 episodes)

as Frank Teruggi

as Henry Axle

as Barry Fields

as Darius

(1 episode)

(1 episode)

(2 episodes) as Self

as Chuck

(1 episode)

as Jake

(2 episodes)

(1 episode)

(6 episodes) as Harry Fisher

(13 episodes)

(3 episodes)

as Richard III Cast

(1 episode)

(1 episode) as Officer Earl Slatic-Sanitation Police

(1 episode) as Peter Rankin

(2 episodes) Director

(6 episodes) Director

(2 episodes) Director

(3 episodes) Director

(1 episode) Director

(4 episodes) Director

(1 episode) Director

(2 episodes) Director

(43 episodes) Director

(12 episodes) Director

(5 episodes) Director

(1 episode) Director

(1 episode) Director

(5 episodes) Director

(4 episodes) Director

(3 episodes) Director

(3 episodes) Director

(2 episodes) Director

(1 episode) Director

(20 episodes) Director

(2 episodes) Director