Patrick O'Shea

Patrick O'Shea was a male Starfleet lieutenant who worked as an undercover agent in the 2290s, posing as Romulan officer "Berza". Serving aboard the ChR, O'Shea learned of the existance of Romulan sleeper agents withing Starfleet. In order to obtain their identities, O'Shea sabotaged the Romulan ship, then assisted Captain John Harriman in secretly bringing Tal Shiar High Examiner Rokan aboard the USS Enterprise (NCC-1701-B) and staging an interrogation of Harriman. (SS ST (Shakedown))