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