Wagner worked as a model in Los Angeles and gained some television experience by appearing as a hostess in Playboy After Dark, and she was also a contestant on the game show The Dating Game in 1969 (one of her potential suitors, whom she did not choose, was TV actor Roger Ewing).
Following the cancellation of The Bionic Woman in 1978, Wagner continued to act, predominantly in television miniseries and television films.
These included the highly rated 1980 miniseries Scruples, as well as three made-for-TV Bionic reunion movies with Lee Majors between 19.
Wagner was born in Los Angeles, California, the daughter of Marilyn Louise (née Thrasher) and William Nowels Wagner.
When she was seven years old, Wagner's parents divorced and her mother moved with her to the northeast Los Angeles neighborhood of Eagle Rock, near Pasadena.
Wagner continued to act into the 1990s and 2000s, though in less prominent roles, such as a small part in the action movie Ricochet (1991).