McGraw's first major on-screen role was as Detective Cydavia "Cyd" Madison on The Commish (1992–1994). While on the set, she met actor Nicholas Lea and the pair dated for a few years. McGraw later earned recognition for her role as Melissa Scully, Dana Scully's ill-fated sister, in four episodes of The X-Files ("One Breath", "The Blessing Way", "Paper Clip", and "Christmas Carol"). Coincidentally, Alex Krycek, the recurring antagonist responsible for Melissa's death, was played by Nicholas Lea.
In 2006, McGraw played Jane Braun, campaign advisor to presidential candidate Arnold Vinick, in several episodes of The West Wing and appeared in an episode of Bones. She played U.S. Attorney Valerie Por in Close to Home and Hartley Green in Saving Grace in 2007, as well as Annette Barron in two episodes of Journeyman.
McGraw appeared in 2008's The Dark Knight (the sequel to Batman Begins) as Lieutenant Gordon's wife, Barbara. She guest-starred in the Law & Order: SVU episode "Crush" as Samantha Copeland. She had a recurring role as seductive adulteress Bobbie Barrett in the second season of AMC's Mad Men. McGraw co-starred with Kelsey Grammer on the ABC sitcom Hank before its cancellation on November 11, 2009.[1] She enjoyed a recurring role as Erin, Scott Bakula's love interest, on the TNT original series Men of a Certain Age in 2010–11. In 2011 and 2012, she made guest appearances in the 9th season of NCIS in the episodes "Devil's Triangle", "Devil's Trifecta" and "Devil's Triad" as Diane Sterling, an ex-wife of both Leroy Jethro Gibbs and Tobias Fornell.[3] In season 12 of the series, her character's arc was closed when she was murdered in the episode "Check". McGraw appeared again as Diane in 2019, but as a ghost in the episode “Daughters” (season 16). In 2013 she appeared in ABC series Scandal.[2][4]
Personal life
McGraw is married to composer/recording artist Steve Pierson, and they have a daughter, Lucy. They all belong to Pierson's band Jambo, which performs roots music for children.[5][6]