Farrell, one of four children, was born in South St. Paul, Minnesota, the son of Agnes Sarah Cosgrove and Michael Joseph Farrell.
When he was two years old, his family moved fro… See more

During the 1960s, Farrell guest-starred in a few series. Notable roles included playing a young US Forest Service ranger in the Lassie episode "Never Look Back" (February 1967); Federal Agent Modell in the episode "… See more

Even before he was well-known, Farrell was an activist for many political and social causes. He was co-chair of the California Human Rights Watch for ten years, was on the Board of Advisors of the original Cult Awarenes… See more