[6] Wyndham started her acting career as understudy in the role of Hodel in the Broadway production of Fiddler on the Roof.
[citation needed] Wyndham first made a name for herself when she played Charlotte Waring Fletcher Bauer, (posing as Tracy Delmar) on the soap opera Guiding Light from 1967 to 1971.
When she left The Guiding Light, she became a hot commodity in casting circles, with many soap operas offering contracts to her.
The character of Rachel was reformed after being paired with a much-older book publisher, Mackenzie Cory (Douglass Watson).
Wyndham appeared in an episode of Law & Order: Special Victims Unit on January 2, 2007, as Rita Colino, a former wife of the dead partner of Brian Dennehy's character.