Treat Williams

as Agent Jameison R. Donovan

as Brian Grabler(1 ep)

as Bill Mitchell

as Amon Carter

as Sheriff Tarsy

as Bill Mitchell

as Carl Pellam

as Dr. Welch

as Dan Henderson

as Anderson Clarke

as Frank Barron

as Roy

as Bill Paley(8 eps)

as Mick O'Brien(55 eps)

as Ted Kennedy

as Charlie Winship

as Colonel Stephen Glen(13 eps)

as Robert Grant

as Jason Wheeler

as General Hank Wallace

as Gabe

as Max Salinger(2 eps)

as Robert Lowell

as Becker

as Benny Severide(16 eps)

as Dr. Grey

as Don Kowalski(13 eps)

as Dr. Warren

as Mr. Tucker

as Colonel Wessinger

as Jack Corbett

as Captain Jeff Clark

as Aron's Dad

as Lenny Ross(1 ep)

as Mick Logan(2 eps)

as Mark Schorer

as James Bennett(3 eps)

as Sam Phelps(3 eps)

as Robert Terrell(2 eps)

as Doug

as Gary Stiles

as Norman Cohen

as Pete Rising(1 ep)

as Jack Fuller Sr.

as Burt Valencia

as Padre Amy

as Dr. Nate Grant(10 eps)

as Luis Gordon

as Michael Peterson

as Self / Daniel Ciello

as David Morton(4 eps)

as Walter Collins

as Self(2 eps)

as Andrew Brown(89 eps)

as Mr. Spencer Runcie

as Hal

as Stephen Carrow

as Dr. David Henning

as Sam Garrett

as Self(1 ep)

as Will

as Mike Jeffers

as Karl Thomasson

as Agent Jason Ross

as Sam Bishop(1 ep)

as Self

as Jake Stanton(1 ep)

as Theodore Lytton(2 eps)

as Karl Thomasson

as Noah Stone

as Pat

as Karl Thomasson

as John McDonald

as John Finnegan

as Self(2 eps)

as Billy Burke

as Xander Drax

as Self

as Fitzgerald

as Michael Ovitz

as Self

as Critical Bill

as Johnny Ross

as Jack Brenner

as George McCallister

as Peter Barnum

as Howard Prince (archive footage)

as Champ's Manager

as Jack Harold(19 eps)

as Robby Smith

as Alan Masters

as Milo (voice)(2 eps)

as Dave Murray

as Alan Palliko

as Earl Rogers

as Robert Laidlow

as Max Rosenberg

as Ray Carson(3 eps)

as Treat Williams (voice)(1 ep)

as Hoyt Cunningham

as Howard Prince (segment "None But the Lonely Heart")(1 ep)

as Scott Weston

as Det. Roger Mortis

as Mark Hendrix

as David Ziegler

as Peter

as Rick Guida

as Rick Guida(2 eps)

as Self

as Prince Andrew

as J. Edgar Hoover

as Terry

as Arnold Friend

as Self

as Jimmy O'Donnell

as Ernie Wyatt

as Stanley Kowalski

as Jack Dempsey

as Ferdinando detto Giugiù

as Prince Andrew(1 ep)

as Self

as Hudley T. Singleton III(1 ep)

as Arnold Friend(1 ep)

as Narrator

as D.B. Cooper

as Daniel Ciello

as Cletus

as Echo Base Trooper (uncredited)

as Cpl. Chuck 'Stretch' Sitarski

as George Berger

as Captain Clark

as Central Park Jogger (uncredited)

as Michael Brick

as Billings

as Self(1 ep)

as Self - Performer(1 ep)