Captain Kirk
Spock
Dr. McCoy
Scotty
Sulu
Dr. Chapel
Chekov
Uhura
Ilia
Decker
Janice Rand
Klingon Captain
Alien Boy
Epsilon Technician
Airlock Technician
Commander Branch
Assistant to Rand (as John D. Gowans)
Cargo Deck Ensign
Lt. Commander Sonak
Chief DiFalco
Lieutenant (as Michele Ameen Billy)
Technician
Chief Ross
Lt. Cleary
Woman (as Susan J. Sullivan)
Crew Member
Klingon Crewman
Klingon Crewman (as Bill McTosh)
Klingon Crewman (as Joel Schultz)
Vulcan Master
Security Officer
Yeoman
Technical Assistant
Enterprise Computer (voice)
Enterprise Crewmember (uncredited)
Crew Member (uncredited)
Enterprise Sciences Crewmember (uncredited)
Enterprise Crew Member (uncredited)
Rec Deck Crewmember (uncredited)
Crew - Rec Room (uncredited)
Extra (uncredited)
Security Guard (uncredited)
Vulcan Enterprise Crew Member (uncredited)
Engineering Officer (uncredited)
Star Fleet Command Officer (uncredited)
Crewman (uncredited)
Crew Member on Rec Deck (uncredited)
Federation Civilian (uncredited)
Perfect Alien (uncredited)
Rhaandarite Crewman (uncredited)
Starfleet Officer (uncredited)
Engineering Chief / Medical Crew Member (uncredited)
Epsilon IX Crew Member (uncredited)
Enterprise Crew Member on Rec Deck (uncredited)
Starfleet Officer at Air Tram Station (uncredited)
Crewmember (uncredited)
Klingon (uncredited)
Saurian Crewmember (uncredited)
Vulcan Citizen on Earth (uncredited)
Vulcan Medic (uncredited)