Dalton got her first break when she played a small role in Tango & Cash in 1989. She also played a small role in A Night at the Roxbury in 1998. She appeared as Jack Nicholson's character Frank Costello's girlfriend Gwen in The Departed (2006).
Dalton is perhaps best known for her role as reporter Dana Bright in USA Network's The Dead Zone, starring Anthony Michael Hall.
Dalton's other television appearances include Beverly Hills, 90210, Murder, She Wrote, Diagnosis Murder, Sliders, Stargate SG-1, and CSI: NY. She has also appeared in TV movies, such as Danielle Steel's Family Album, They Nest, Surviving Gilligan's Island (2001) (in which she portrayed actress Tina Louise), Babysitter Wanted and Gleason.
