Blossom made his first television appearance in 1958 in the television series "Naked City". From 1976 to 1978, he starred on the television soap opera "Another World", in which his role on the show won him a Soapy Award for Best Villain. His other television credits include "Moonlighting", with Cybill Shepherd and Bruce Willis, "Tales from the Darkside", "The Equalizer", the revived 1980s version of "The Twilight Zone" and "Chicago Hope". His television films include "John Brown's Raid", "Family Reunion", with Bette Davis, the 1985 version of "Noon Wine", "Murder in the Heartland" and Disney's "Balloon Farm", which was his final role as an actor.