Louis Herthum (born July 5, 1956) is an American actor and producer. Herthum has worked as a stage, television, and film actor, and he has also appeared in national television commercials. He is best known for his recurring role as Dep. Andy Broom on Murder, She Wrote and Peter Abernathy in the HBO television series Westworld. Description above from the Wikipedia article Louis Herthum, licensed under CC-BY-SA, full list of contributors on Wikipedia.