In 1990, Marshall had a guest role as
Iris West, the love interest of
Flash (Barry Allen) in the pilot episode on
The Flash. In 1991, she guest-starred on
Superboy with a young Clark Kent before he called himself
Superman, playing the villainous Christina Riley, a woman who is, in secret, a werewolf. In 1992, Marshall had a three-episode guest role on
The Wonder Years and later guest-starred on
Seinfeld,
Nash Bridges,
Grapevine and
Diagnosis: Murder. Later in 1992, she appeared in the movie
Hellraiser III: Hell on Earth as Terri. In 1994, she got her first sitcom role on
Wild Oats. In 1995, Marshall starred in the science fiction cult classic
W.E.I.R.D. World, directed by William Maloneas, as Dr. Abby O'Reardon, an evil scientist who rejuvenates her boss (and later becomes his mother) and is bent on turning grown men into babies. After a few years in B movies, Marshall gained a role on 1997's
Chicago Sons. The same year, she landed a recurring role on
Spin City and starred with
Bette Midler and
Dennis Farina in the film
That Old Feeling, where her character fell in love with the paparazzo played by
Danny Nucci. Marshall has been cast in several pilots that were not picked up, including the
Elizabeth Lackey series
Cooking Lessons and
Rob Thomas's
Sticks. Marshall was on Rob Thomas's
Cupid, premiering in 1998. It featured her as Dr. Claire Allen, a psychiatrist supervising a man named Trevor (
Jeremy Piven) who thinks he is
Cupid. Marshall then joined
David E. Kelley's
Snoops about an unconventional detective agency. In 2000, Marshall returned to television screens: first with a three-episode guest appearance as a
porn star and love interest for Jeremy (
Joshua Malina) on
Aaron Sorkin's
Sports Night, and then in
Cursed (a.k.a.
The Weber Show). In 2002, she guest starred on
Just Shoot Me! as the daughter of Nina Van Horn.
Hidden Hills was an offbeat comedy about three families in suburbia. Marshall also had a secondary role in the
Steve Martin-
Bonnie Hunt remake of
Cheaper by the Dozen and a cameo appearance in
Break a Leg, which starred her husband Danny Nucci. In 2004, Marshall appeared in an episode of the TV show
Miss Match, but the series was cancelled before it aired. In October, she had a four-episode role in
Veronica Mars, (created by Rob Thomas), and she reprised the role toward the end of season two. Marshall's next main role came in the sitcom
Out of Practice. In 2007, Marshall appeared in the
Showtime series
Californication. She also was seen in the
FX series
Nip/Tuck as an insecure actress who dated
Dr. Sean McNamara. In 2008, Marshall joined the crime drama
Shark as a recurring character. Marshall starred on the CBS sitcom
Gary Unmarried. She and
Jay Mohr played a divorced couple sparring while trying to be loving parents to their two children. The show was her first to be picked up for a second season. Marshall had a guest role in
House, playing
Julia, sister of
Lisa Cuddy. In 2012, Marshall guest starred in an episode of
CSI: Crime Scene Investigation. She played the role of Kathy Veck, owner of an oil company. In 2013, Marshall guest starred in two episodes of
Two and a Half Men as Alan Harper's transgender girlfriend Paula. In 2021, Marshall appeared in
Walker as Gale Davidson, an enemy to Cordell Walker (
Jared Padalecki) and his family. ==Personal life==