His many credits include Perception, The Mentalist and Desperate Housewives. He is also known for his award-winning performance in the title role of the original Broadway production of Bob Fosse's Pippin, and his role in Children of a Lesser God, for which he received a Tony Award.
- He also appeared in two other monster-of-the-week style TV series, Angel and Charmed. In Season 7 and Season 11, Harry Groener and Keith Szarabajka would appear in Supernatural, who also appeared in the Buffyverse and Charmed.
- John Rubinstein @ Wikipedia