Canadian actor Les Lye, known to millions of North Americans in their 20's, 30's and 40's as the omnipresent adult on 'You Can't Do That on Television,' has died at 84. According to his CTV obituary, the veteran comic passed away on Tuesday. The cause is unknown.

The Ottawa native was enjoying a successful career in radio when in 1979 he joined the then-local kid's variety show, where he played an assortment of adult roles opposite a cast of kids (including Alanis Morissette, eventually). One of his most repeated characters was Barth, the gross proprietor of Barth's Burgery.
When 'YCDTOTV' moved over to Nickelodeon in the early 1980's, Lye became a household name in America. That is, if your home included children.
Lye appeared in every episode of every season he was in the cast, up until leaving the show in 1990. The show may be best known for its signature sliming whenever someone said "I Don't Know."