After completing high school, Dushku returned to acting with the role of Faith Lehane on Buffy the Vampire Slayer, a Slayer much more troubled than the main character Buffy Summers.Though initially planned as a five-episode role, the character became so popular that she stayed on for the whole third season and returned for a two-part appearance in season four, after which the remainder of her original story arc was played out as part of the first season of the Buffy spin-off series Angel.
When she began her work on that series, Dushku was still a minor, and had to receive emancipation to work the production's long hours.She later recalled with amusement that the judge who handled her emancipation case, who was an avid fan of that show, said that she would sign the emancipation order if she could get a signed photo from Dushku.They write everything – disgusting things that you don't even want to know about. Starting that same year, she starred in a new Fox supernatural drama, Tru Calling, where she played the main character, medical student Tru Davies.And they send me pictures – "Oh, here's a picture of me before I was incarcerated! After having a grant pulled out from under her, Tru is forced to take a job at a local morgue where she discovers her power to "re-live" the previous day over again if one of the deceased asks for her help to change what has happened." – and there's some guy sat on the sofa with a bottle of beer and a moustache, and a big gut. Dushku turned down a role in a spin-off of Buffy The Vampire Slayer which would have been about Faith.
She has had many roles as a "bad girl" in movies and relishes the opportunities.
She was chosen in a five-month search for the lead role of Alice in the film That Night.
In 1993, Dushku landed a role as Pearl alongside Robert De Niro and Leonardo Di Caprio in This Boy's Life, a role that she said opened a lot of doors.
but her agent asked her to submit a videotape audition for a show starring another of his clients, Sarah Michelle Gellar.
After reading the script, Dushku rushed to a local Claire's to purchase dark makeup and other appropriate accessories for the part, Faith on Buffy the Vampire Slayer.
Repentant and rededicated, Faith returned as a heroine in other episodes of Angel and in the last five episodes of Buffy.