Career: Sirtis had supporting roles in a number of films and guest-starring roles on many British TV series before she landed the role of Deanna Troi in Star Trek: The Next Generation. She played the character during all seven seasons and also for episodes of other series in the Star Trek franchise, as well as the feature films Star Trek: Generations (1994), Star Trek: First Contact (1996), Star Trek: Insurrection (1998) and Star Trek: Nemesis (2002). Her first role after she finished Star Trek: The Next Generation was in the TV series Heaven Help Us. She also voiced Demona in the Disney series Gargoyles. Sirtis went on to appear in several films and such TV series as Diagnosis: Murder, The Outer Limits, Earth: Final Conflict, Stargate SG-1, Casualty, Holby City and Grey's Anatomy. She lent her voice to the video game Mass Effect, as well as animated series The Cleveland Show and Adventure Time. More recently, she has appeared in NCIS and voiced the Enterprise's computer in Star Trek Continues.