She certainly had a promising start, playing the title role of Anne Frank in the Broadway production of The Diary of Anne Frank, as well as having a supporting role opposite William Holden in the movie Picnic, but mainstream fame never followed.
Her most interesting work and probably her most famous was in the Roger Corman low budget classics, The Trip and Psych-Out. And even though those films helped launch the careers of Jack Nicholson, Dennis Hopper, Peter Fonda and Bruce Dern, they only seemed to get Susan Strasberg guest starring roles in many forgettable television shows like Lancer and Marcus Welby, M.D.
She was a talented actress, though, that certainly had the connections to be a part of bigger and better projects, but like so many other gifted performers, it just wasn't in the cards. Susan Strasberg lost her battle with cancer in 1999, closing the book on a promising career that never really took off.