On television, Shoop starred on NBC's Return to Peyton Place as Alison MacKenzie Tate #2 from 1973-1974, taking over the role from Katherine Glass, and she had the role of Miss Dorothy Carlyle on Galactica 1980. She appeared in the pilot episode of Knight Rider ("Knight of the Phoenix") and later on in the season four premiere ("Knight of the Juggernaut"). She also appeared in the pilot episode of Magnum, P.I.
Shoop's best known film role was in the horror film Halloween II (1981), as Nurse Karen Bailey.
On November 15, 1987, Shoop married Terrance Sweeney, a former Jesuit priest, in Pacific Palisades, Los Angeles. Together, they wrote What God Hath Joined (ISBN 034538203X).
Other guest appearances include The Mod Squad, B. J. and the Bear, Buck Rogers in the 25th Century, Simon & Simon, Wonder Woman, The Incredible Hulk and Murder, She Wrote. Shoop's last credited appearance was a 1996 episode of Kung Fu: The Legend Continues, but she continues to attend conventions associated with films in which she appeared. She appeared in the 2006 DVD release Halloween: 25 Years of Terror.
