Career
Lannom is best known for playing Lester Hodges on the television series Harry O from 1974 to 1976, and his role as Sergeant Casper in Southern Comfort. He appeared as a guest on the television series Judging Amy, The X Files, Emergency, New York City Police Department Blue, The Larry Sanders Show, Columbo, Scarecrow and Mistress King, CHiPs, Benson, Knots Landing, The Waltons (as Sweet Billy), The Streets of San Francisco, Cannon, and The Hardy Boys/Nancy Drew Mysteries.
He played Larry Penzoss in the 1985 television miniseries Space and played Bufe Coker in the 1978 television miniseries Centennial.
Both miniseries were based on James A. Michener novels. He also appeared in the movie Silkwood (1983).
From 2002-2006, Lannom appeared onstage as Detroit Brent Randall in Dark Legends in Blood.
In 2007, he lent his considerable talent to the students of the Speech & Acting Team at his hometown high school Johnston City, Illinois, acting as a volunteer assistant coach.
In April 2008, he returned to the high school stage as "Vince Fontaine" in Grease. He is currently semi-retired and residing in his hometown of Johnston City, Illinois, where he performs as a solo piper and in a Celtic duo.