Filmography
| Year | Title | Role | Notes |
|---|---|---|---|
| 2002 | Angel | Prima Ballerina | (TV series, 1 episode: "Waiting in the Wings") |
| 2002–2003 | Firefly | River Tam | (TV series, 14 episodes) |
| 2003 | Cold Case | Paige Pratt | (TV series, 1 episode: "Love Conquers Al") |
| 2004 | Sleepover | Ticket Girl | |
| 2004 | CSI: Crime Scene Investigation | Mandy Cooper | (TV series, 1 episode: "What's Eating Gilbert Grissom?") |
| 2005 | Serenity | River Tam | Saturn Award for Best Supporting Actress |
| 2005–2007 | 4400, TheThe 4400 | Tess Doerner | (TV series, 9 episodes) |
| 2006 | Mammoth | Jack Abernathy | Television movie |
| 2006 | Initiation of Sarah, TheThe Initiation of Sarah | Lindsey Goodwin | Television movie |
| 2006–2007 | Unit, TheThe Unit | Crystal Burns | (TV series 7 episodes) |
| 2008–2009 | Terminator: The Sarah Connor Chronicles | Cameron Phillips/Allison Young | (TV series, 31 episodes) Saturn Award for Best Supporting Actress on Television Nominated-Teen Choice Award for Choice TV Breakout Star: Female Nominated-Teen Choice Award for Choice TV Actress: Action Nominated-Saturn Award for Best Supporting Actress on Television |
| 2009 | Big Bang Theory, TheThe Big Bang Theory | Herself | (TV series, 1 episode: "The Terminator Decoupling") |
| 2009–2010 | Dollhouse | Bennett Halverson | (TV series, 4 episodes) |
| 2010 | Chuck | Greta | (TV series, 1 episode: "Chuck Versus the Fear of Death") |
| 2010 | Deadly Honeymoon | Lindsey Ross Forrest | Television movie |
| 2010 | Superman/Batman: Apocalypse | Kara/Supergirl (voice) | |
| 2011 | Legend of Hell's Gate: An American Conspiracy, TheThe Legend of Hell's Gate: An American Conspiracy | Maggie Moon | |
| 2011 | Cape, TheThe Cape | Jamie Fleming | (TV series, 10 episodes) |
| 2011-2012 | Alphas | Skylar Adams | (TV series, 4 episodes) |
| 2012 | Grey's Anatomy | Nurse Emily Kovach | (TV series, 2 episodes) |
| 2012 | Help for the Holidays | Christine | Television movie |
| 2013 | Knights of Badassdom | Gwen | Post-production |
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