Guest Stars Pat Healy as Alien Slave (Mirror Universe) Gregory Itzin as Admiral Black (Mirror Universe) Gary Graham as Soval (Mirror Universe) Derek Magyar as Ensign Kelby (Mirror Universe) John Mahon as Fleet Admiral Gardner (Mirror Universe) Co Starring Majel Barrett Roddenberry voices Computer Voice David Sobolov voices Slar (Mirror Universe) Uncredited Jef Ayres as Crewman Haynem Solomon Burke Jr. as Ensign Billy (Starfleet) Duncan K. Fraser as Ensign Walsh John Jurgens as Command / Operations Division Crewman Kevin Derr as Kelly (Mirror Universe) Glen Hambly as Avenger Andorian Helmsman (Mirror Universe) Andrew Macbeth as E. Hamboyan (Mirror Universe) Andrea Lockhart as Avenger Orion Crewmember (Mirror Universe)