 Vincent guest-starred in three episodes of "Lassie" with actor Tony Dow and two episodes of "Bonanza".In 1970, Vincent garnered critical praise for his role in the made-for-TV film "Tribes" (also known as "The Soldier Who Declared Peace" in Europe and the UK), co-starring Darren McGavin, about a tough Marine boot-camp drill instructor dealing with a hippie draftee (Vincent) who will not follow the rules.He gave a complex performance opposite Robert Mitchum in "Going Home" (1971).