Treat Williams

as Agent Jameison R. Donovan

as Bill Mitchell

as Amon Carter

as Sheriff Tarsy

as Carl Pellam

as Bill Mitchell

as Dr. Welch

as Dan Henderson

as Anderson Clarke

as Frank Barron

as Roy

as Ted Kennedy

as Charlie Winship

as Robert Grant

as Jason Wheeler

as General Hank Wallace

as Gabe

as Robert Lowell

as Becker

as Dr. Grey

as Dr. Warren

as Mr. Tucker

as Colonel Wessinger

as Jack Corbett

as Brian Grabler • 1 eps

as Bill Paley • 8 eps

as Mick O'Brien • 55 eps

as Colonel Stephen Glen • 13 eps

as Max Salinger • 2 eps

as Benny Severide • 16 eps

as Don Kowalski • 13 eps

as Lenny Ross • 1 eps

as Mick Logan • 2 eps

as James Bennett • 3 eps

as Robert Terrell • 2 eps

as Pete Rising • 1 eps

as Dr. Nate Grant • 10 eps

as David Morton • 4 eps

as Self • 2 eps

as Andrew Brown • 89 eps

1 eps

as Sam Bishop • 1 eps

as Jake Stanton • 1 eps

as Theodore Lytton • 2 eps

as Self • 2 eps

as Jack Harold • 19 eps

as Milo (voice) • 2 eps

as Ray Carson • 3 eps