This actor was on an all-time hit show.
He was not the lead, but was second fiddle.
This was an iconic show with an iconic actress.
Our actor was a drunk and only got hired because he was best friends with the lead actor of the show who was married to the actress.
Our actor would generally be drunk while shooting and was hated by the woman who played his wife.
Show: I Love Lucy
Actor: William Frawley
Lead actor (Husband): Desi Arnaz
Actress (Wife): Lucille Ball
Played his wife: Vivian Vance