Captain America

Reb Brown

as Captain America / Steve Rogers

Len Birman

as Dr. Simon Mills

Heather Menzies

as Dr. Wendy Day

Robin Mattson

as Tina Hayden

Joseph Ruskin

as Rudy Sandrini

Lance LeGault

as Harley

Frank Marth

as Charles Barber

Steve Forrest

as Lou Brackett

Harry Johnson

as Jerry

James Ingersoll

as Lester Wiant

Jim B. Smith

as F.B.I. Assistant

Jason Wingreen

as Surgeon

June Dayton

as Secretary

Diana Webster

as Nurse

Dan Barton

as Jeff Haden

Ken Chandler

as 1st Doctor

Buster Jones

as Anesthetist

Nocana Aranda

as Throckmorton (uncredited)

Michael McManus

as Ortho (uncredited)

Lonnie Pense

as Wino in Park (uncredited)

Charles A. Tamburro

as Helicopter Pilot (uncredited)