Nicole de Boer Nicole de Boer is the Canadian actress who portrayed Ezri Dax during the seventh and final season of . Early career . De Boer was born in Toronto , Canada . She performed in commercials and theater throughout her childhood and made her television debut in a Red Skelton TV special called " Freddy the Freeloader ' s Christmas Dinner " at age 11 . When de Boer was seventeen , she landed a regular role on the Canadian drama series " 9B " , which aired briefly in 1988 . She was then given a recurring role on the popular Canadian sketch comedy series " Kids in the Hall " , on which guest star Scott Thompson was a regular performer . On this series , de Boer usually played Laura , the girlfriend of the angst - filled teenager Bob , played by Bruce McCulloch . In 1990 , de Boer was seen in the American TV movie " The Kissing Place " , which starred guest actor David Ogden Stiers . She also starred in the short - lived Canadian series " First Resort " during this year . In 1991 , de Boer appeared in an episode of the science fiction series " Beyond Reality " in which she was directed by Allan Kroeker , who later directed her in three episodes of " Deep Space Nine " . After this initial appearance , de Boer won a recurring role on " Beyond Reality " as Celia Powell and again worked with Allan Kroeker in at least one other episode . She was also directed by Kroeker in the first two episodes of the horror - mystery series " Forever Knight " in 1992 . She made her film debut with the lead role in the 1992 horror sequel " Prom Night IV : Deliver Us from Evil " . That same year , she became a regular on the Canadian series " Catwalk " , during which time she again worked with Allan Kroeker . Paul Popowich was also a regular on this series , which aired through 1994 . 1995 - 1999 . In 1995 , de Boer made an appearance on William Shatner ' s " TekWar " series . She also appeared in the 1995 science fiction film " Jungleground " . This was followed by the 1995 comedy " National Lampoon ' s Senior Trip " , in which she worked alongside Matt Frewer . The main antagonist of this film was a mad hardcore " Star Trek " fan . She then reunited with the " Kids in the Hall " group for the 1996 film " Kids in the Hall : Brain Candy " , in which she appeared as a groupie for the Dr . Cooper character played by Kevin McDonald . De Boer was again directed by Allan Kroeker on an episode of " PSI Factor : Chronicles of the Paranormal " in 1996 . She then appeared in an episode of " Poltergeist : The Legacy " with Brian George . Some of the other television series on which de Boer appeared early in her career are " Street Legal " , " C . B . C . ' s Magic Hour " , " E . N . G . " , and " The Outer Limits " . In 1997 , de Boer starred in the cult , low - budget Canadian science fiction / horror / thriller film , directed by Vincenzo Natali . That same year , she starred as Yuna in the short - lived science fiction series " Deepwater Black " . The following year , de Boer appeared in an episode of " The Outer Limits " directed by Allan Eastman . She then had a supporting role in the 1999 TV movie " Family of Cops III : Under Suspicion " . She then began starring in the Canadian television series " Dooley Gardens " . It was while working on this series that de Boer got the call to audition for the role of Ezri Dax on " Star Trek : Deep Space Nine " . " Deep Space Nine " . In 1998 , actress Terry Farrell departed the cast of " Deep Space Nine " and her character , Jadzia Dax , was killed off . The producers decided to create a new female character who would inherit the . When it was decided that the new character would be someone who was unprepared to be joined with a symbiont , the producers began looking for a young actress who could convey vulnerability . It was writer and supervising producer Hans Beimler who asked de Boer to audition for the part . Beimler had worked with de Boer on " Beyond Reality " and " TekWar " ; Beimler was a producer on both shows . According to de Boer , Beimler ( who previously worked on " Star Trek : The Next Generation " ) told her he would one day get her on " Star Trek " , although she " thought he was just being nice . " In 1998 , however , Beimler made good on his promise . He asked de Boer to send in a videotaped audition , which led to a live audition for the showrunners in Los Angeles . Just prior to the audition , de Boer endured some minor embarrassment . Before she started , she was offered a drink of water , which she accepted . She took a gulp of the water just as she was about to meet Rick Berman and Ira Steven Behr , at which time the water went down the wrong pipe and she began coughing and gasping . As she caught her breath and her composure , she thought she had blown the audition . Nonetheless , she was ultimately cast in the role of Ezri Dax . ( " " ) De Boer appeared in all 25 episodes of " Deep Space Nine " s seventh season , from to the series finale , . Post - DS9 . After " Deep Space Nine " came to an end in , de Boer starred in the Showtime movie " Rated X " , a biography of pornography pioneers Jim and Artie Mitchell ( Charlie Sheen ) . She played Karen , Artie Mitchell ' s second wife ; Terry O ' Quinn portrayed J . R . Mitchell , father of the Mitchell brothers and Karen ' s one - time father - in - law . From 2002 through 2007 , de Boer starred as Sarah Bannerman on the USA Network series , created by Michael Piller ( who also co - created " DS9 " and " " ) and Shawn Piller . David Ogden Stiers , a fellow " Trek " alum who de Boer previously worked with on the TV movie " The Kissing Place " , made frequent appearances on this series as Reverend Purdy . She later appeared in the " Stargate Atlantis " episode , " Whispers " , portraying Dr . Alison Porter , in which she worked alongside Paul McGillion . Robert Picardo was a regular on this series at the time , but he did not appear in de Boer ' s episode . She appeared in the 2010 film , with Malcolm McDowell and Iggy Pop . Personal life . De Boer married musician John Kastner in 1999 but they have since divorced . They have a daughter named Summer . De Boer cites and as two of her favorite TV shows .