<P> Quinn is portrayed by actress Dianna Agron . In casting Glee, series creator Ryan Murphy sought out actors who could identify with the rush of starring in theatrical roles . Instead of using traditional network casting calls, he spent three months on Broadway looking for unknown actors . Agron was the last primary actor to be cast, having won the role only days before the pilot began filming . Agron auditioned for Glee coming from a background in dancing and acting . She has been taking dance classes since the age of three, appeared in many music theatre productions and has appeared in television roles for Skidmarks, CSI: NY, and Heroes . Agron said in a 2009 interview pertaining to her casting session: "I nearly bailed on my audition for the show . I was so nervous". With her wholesome good looks, Agron certainly looked the part, but the producers wondered if she appeared too innocent . Agron said in an interview: "They told me to come back with straight hair and to dress sexier . Later that week, I started work ." Agron auditioned with Frank Sinatra's "Fly Me to the Moon". The Glee producers said "we really lucked out in finding Agron to play Quinn". </P> <P> In December 2010, Ryan Murphy announced that the cast of Glee would be replaced at the end of the third season to coincide with their graduation . Murphy said: "Every year we're going to populate a new group . There's nothing more depressing than a high schooler with a bald spot ." He also revealed that some of the original cast will leave as early as 2012: "I think you have to be true to the fact that here is a group of people who come and go in these teachers' lives ." Although four graduating seniors were confirmed in January 2012 as returning in the fourth season--Rachel, Finn, Kurt and Santana--there had been no announcement regarding Quinn or any other seniors as of the end of February 2012 . As of May 2012, Murphy stated that all graduating seniors will come back for season 4 but, not all will be doing "all 22 episodes". </P> <P> Quinn is described by Agron as Rachel Berry's (Lea Michele) enemy, and "terrible, the meanest girl". Agron said that her favorite part of Quinn is that "she's smart . But she's also human, and through her tough exterior, she's often a little girl lost ." Interviewmagazine. com's Lauren Waterman has described her as being "lovable, but occasionally a manipulative deposed queen bee ." Agron commented: "Yes, there is a stereotype with these characters and it wouldn't be fair if (those stereotypes) didn't exist a little bit . But (co-creator) Ryan Murphy has a way of taking everything and turning it upside down . That's the great thing about this show and these characters: nobody is one note, which is amazing ." Quinn was originally conceived as the antagonistic queen bee head cheerleader, a departure from Agron's actual high school experience . Agron said in an interview with HitFix: "I definitely wasn't cool in high school . I really wasn't . I did belong to many of the clubs and was in leadership on yearbook and did the musical theater route, so I had friends in all areas, but I certainly did not know what to wear, did not know how to do my hair, all those things ." She added: "I think that it shows that regardless of who you are and what group you belong to, that there are so many emotions behind each person in high school . Sometimes with teens, writers or directors, anybody, short - changes them and makes them be simple, simple individuals, you're either the jock or the popular kid or the nerd . They don't show those shades . Everybody has those shades to them . This show, it really expands upon vulnerability and excitement and anger all the experiences that you probably actually go through in high school ." </P> <P> Quinn's role as head cheerleader is central to understanding her character . Agron said that she had never had any prior cheer experience before the Pilot . "If I had been (a cheerleader), I would've ended up on crutches," she told Emmy magazine . In an interview with HitFix she said, "I have new respect for the craft, because I slightly hurt myself during the pilot, coming down from one of the stunts . It's better now . I didn't tear something in my knee, but I strained it . Knees are very sensitive, I've learned . It's crazy, because I've been dancing since I was three on my toes and all these things . And you should never say this, but I've never injured myself ever . I'd seen gnarly injuries with dance and all these things . You shouldn't say that, though, because every day is an opportunity to fall, hurt yourself, so that was my experience ." </P>

What episode did quinn get in a car accident