Overview
Liam Sullivan (May 18, 1923 – April 19, 1998) was an American actor and singer, originally from Jacksonville, Illinois. He began acting while a student at Illinois College and continued in theater at Harvard University. In 1951 he began his career on Broadway appearing in The Constant Nymph.
Career
Sullivan appeared mostly in television roles during his career. In the mid-1950s, he appeared on the religion anthology series Crossroads. In 1961–62, Sullivan made three guest appearances on Perry Mason, including the 1962 episode "The Case of the Unsuitable Uncle" and in each episode played the murder victim.
He portrayed Patrick Henry in the Daniel Boone episode "Love and Equity", scientist Anthony Sterling in the Voyage to the Bottom of the Sea episode "Leviathan", Nexus in the Lost in Space episode "His Majesty Smith", an army lieutenant in the episode "The Winter Soldier" on Rawhide, Mr. Willis in Knots Landing, Dr. Burt Hammond in St. Elsewhere, and Mr. Plenn in Falcon Crest. In 1966, he portrayed Terrence O'Toole in an episode of Bonanza ("The Dublin Lad"). He also appeared as Dr. Tolvar in a 1976 episode of Hawaii Five-0 ("The Capsule Kidnapping").
He played the prosecuting attorney in the "Hill 256" episode of Combat! In the Dragnet episode "The Big Prophet" (1968), Sullivan as his character Brother William (a thinly disguised portrayal of Timothy Leary) held forth for the entire half-hour on the benefits of LSD and marijuana while Joe Friday argued the opposing view. Sullivan played a similar role on a 1970 episode of Adam 12 as a con artist/cult leader.
In 1966–67 season, he appeared as Major Mapoy in all twenty-six episodes of the ABC Western series The Monroes with Michael Anderson, Jr., and Barbara Hershey. He appeared in films such as That Darn Cat! (1965) as Graham and The Magic Sword (1962).
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