Dennis Quaid

as “Cowboy” Jack Clement

as Self

as Duane 'The Wrecking Ball' Whitlock(1 ep)

as Sander

as Carl Rikker

as Sam Houston

as Arthur

as Sheridan

as Self - Host(4 eps)

as Narrator (voice)

as John Bouchart

as George Brandywine

as Rind - Shrouded Knight (voice)

as Keith Jesperson aka 'Happy Face Killer'(8 eps)

as Harvey

as Ronald Reagan

as Self

as Self - Host(19 eps)

as Frank Mitchell

as Presenter(4 eps)

as Marshal Sherrill Lynn(8 eps)

as Self

as James Hill

as Birdwatcher

as Jeff McCusker(6 eps)

as Doug White

as Jaeger Clade (voice)

as Self (archive footage)

as Narrator

as Beauchamp

as Dick Vermeil

as Wade

as Mason

as Narrator

as Self(1 ep)

as Self

as Don Quinn(8 eps)

as Vice Admiral William 'Bull' Halsey

as Joe

as Self - Guest(1 ep)

as Self(1 ep)

as Kelly Johnson

as Charlie Peck

as Ethan Montgomery

as Hal Solinski

as Arthur

as Adult Ethan

as Head Ranger

as Wade Blackwood(8 eps)

as Samuel Brukner(20 eps)

as Lt. Colonel Roger Charles

as Narrator (voice)

as Michael Lennox(14 eps)

as Self(1 ep)

as Lucky Luciano(1 ep)

as Charlie Wessler (segment "The Pitch")

as Carl

as Sheriff Ralph Lamb(21 eps)

as Clay Hammond

as Henry Whipple

as Ramsey

as Self

as Ely

as Rev. Shaw Moore

as Tom Hamilton

as Ted Murphy(1 ep)

as Bill Clinton

as Bob Hanson

as Payton

as Self (archive)

as General Hawk

as Self - Guest(4 eps)

as Aidan Breslin

as Ben Schwartzwalder

as Lawrence Wetherhold

as Thomas Barnes

as Roven (voice)

as Self

as Voice

as President Staton

as Frank Beardsley

as Self - Guest(1 ep)

as Dan

as Frank Towns

as Jack Hall

as Sam Houston

as Himself/Host

as Cooper Tilson

as Self(5 eps)

as Self

as Self - Guest(1 ep)

as Self(1 ep)

as Frank Whitaker

as Jimmy Morris

as Gabe

as Self

as Arnie Metzger

as Self

as Frank Sullivan

as Jack 'Cap' Rooney

as Redbeard Krabs (voice)(1 ep)

as Hugh

as Nick Parker

as Jim Clay

as Joshua Rose

as FBI Special Agent Frank LaCrosse

as Joe Doe / William

as Self(4 eps)

as Self - Guest(1 ep)

as Uncle Tommy

as Self

as Self(2 eps)

as Bowen

as Self(1 ep)

as Eddie Bichon

as Self(1 ep)

as Doc Holliday

as Narrator (voice)

as Self

as Arlis Sweeney

as Self - Guest(1 ep)

as Jeff Blue

as Self - Guest(1 ep)

as Wallace

as Jack Faulkner

as self(1 ep)

as Jack McGurn

as Jerry Lee Lewis

as Gavin Grey

as Dexter Cornell

as Eddie Sanger

as Lt. Tuck Pendleton

as Remy McSwain

as Willis Davidge

as Alex Gardner

as Barry Morrow

as Gordon Cooper

as Mike Brody

as Art Long

as Kyle Hager

as Barry Morrow

as Extra at Graduation Ceremony

as Travis Child

as Lar

as Freddie Dupler

as Repairman (uncredited)

as Ed Miller

as Mad Grossman

as Mike

as Roy

as Phil Lawver

as Alan Darby

as Paul Morelli

as Frank

as Shark, Baseball Pitcher

as Self - Host(1 ep)

as Bellhop

as Self(1 ep)

as Self(1 ep)

as Self(1 ep)