Denise Crosby

Even though she was only on the show for the best part of a season before dying at the hands of evil alien Armus , Tasha continued to pop up in the most unlikely of places. She was a key figure in the alternate timeline for the classic episode " Yesterday's Enterprise " and showed up again in a recurring role as Sela , half- Romulan daughter of the alternate Tasha Yar. And, fittingly enough, she returned as Tasha in the final episode of the series, " All Good Things In TNG 's first season, Crosby immediately invested Tasha with a tough-as-nails scrappiness — she could easily take nearly anyone on the ship in hand-to-hand combat, making her a top-notch chief of security. Crosby also revealed other elements of Tasha during her short tenure.