Other than Henry Winkler, only one other actor or actress appeared in all 255 episodes of Happy Days. Name him or her.

Tom Bosley, playing Mr. Cunningham, appeared in every single episode of the series, along with Henry Winkler. Bosley also holds the distinction of having appeared in the pilot, which did NOT feature Winkler.

Asked by Tom Cohen · Last updated 5 years ago · 289.6K views