Jadzia Dax – Terry Farrell
There’s not a single person who can’t forget Jadzia Dax! The space station’s Starfleet science officer, who is from an alien species known as the Trill, and is host to a 300-year-old symbiont. When Farrell left the show at the end of the sixth season, Paramount killed off Farrell’s “host” character (but continued the “symbiont” character in a new host, played by Nicole DeBoer). She is retired from acting and is focusing on her family.