

The Enterprise-A has not yet been decommissioned (despite the fact that the order to return to Spacedock for decommissioning was given on Stardate 9529.1-this is in the short scene in 'our' universe-and Sulu's first log was on Stardate 9585.9), but Sulu is in command of the Excelsior, placing the game somewhere in the time frame after Star Trek VI: The Undiscovered Country (Sulu does reference the events of the film in one of the cutscenes, placing the game after the film). While the game takes place at some point during the era of the Star Trek films, it is unclear exactly when. During their trek home, the Excelsior crew encounter mirror universe variations of the original series' missions, including the M5 multitronic computer ( The Ultimate Computer), Balok ( The Corbomite Maneuver), the giant space amoeba ( The Immunity Syndrome), and the Planet Killer ( The Doomsday Machine). They are hunted by Mirror-Chekov, who commands the ISS Enterprise, and assisted by the Klingons and Romulans. In the game, Captain Hikaru Sulu and the crew of the USS Excelsior swap places with the crew of the mirror universe ISS Excelsior as a result of a localized stellar ion storm.
