
Majel Barrett
Christine Chapel / Starfleet Computer (voice)

Lou Scheimer
Lemus / Aquan Harvester (voice) (uncredited)
David Gerrold
Security Ensign (voice) (uncredited)
Norm Prescott
Orion lieutenant / Orion ensign (voice) (uncredited)

Stanley Adams
Cyrano Jones (voice) (uncredited)

Roger C. Carmel
Harcourt Fenton Mudd (voice) (uncredited)

Ted Knight
Vendorian / Carter Winston (voice) (uncredited)

Ed Bishop
Asmodeus (voice) (uncredited)

Mark Lenard
Sarek (voice) (uncredited)
Billy Simpson
Young Spock (voice) (uncredited)
Keith Sutherland
Young Sepek (voice) (uncredited)
Jane Webb
Lara / Vedala Female (voice) (uncredited)