When a Romulan weapons test goes wrong, the Enterprise is trapped between dimensions and Lt. Commander Sulu finds himself 30 years out of place and the key to saving the crew of the Enterprise as the precarious grasp on their own dimension begins to slip. Guest starring George Takei, who returns to the role of Hikaru Sulu, which he played on television in Star Trek (TOS) and in Star Trek: Voyager, as well as in the six feature Star Trek films.