- 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)
- David Gerrold - Security Ensign (voice) (uncredited)
- David Gerrold - EM / 3 / Green (voice) (uncredited)
- Lou Scheimer - Demos / Dramian Guard (voice) (uncredited)
- Lou Scheimer - Lemus / Aquan Harvester (voice) (uncredited)
- Lou Scheimer - Romulan Crewman (voice) (uncredited)
- Keith Sutherland - Young Sepek (voice) (uncredited)
- Norm Prescott - Romulan Commander (voice) (uncredited)
- Norm Prescott - Orion lieutenant / Orion ensign (voice) (uncredited)
- D.C. Fontana
- Lou Scheimer
- Norm Prescott
- Gene Roddenberry
Mark Lenard hace el papel de Sarek (voice) (uncredited).
Stanley Adams interpreta a Cyrano Jones (voice) (uncredited) en la serie.
William Shatner interpreta a James T. Kirk (voice) en la serie.
Leonard Nimoy hace el papel de Spock (voice).
DeForest Kelley hace el papel de Leonard McCoy (voice).
George Takei interpreta a Hikaru Sulu (voice) en la serie.
Nichelle Nichols interpreta a Uhura (voice) en la serie.
James Doohan interpreta a Montgomery Scott (voice) en la serie.
Majel Barrett hace el papel de Christine Chapel / Starfleet Computer (voice).
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