Lilith debuted in the 1986 "Cheers" episode "Second Time Around," becoming a series regular and eventually starting a relationship with Kelsey Grammer's Frasier before the pair got married.
As postman Cliff Claven, John Ratzenberger was the king of useless trivia in Cheers. But ... co-star Ted Danson revealed that the rest of the cast had a hard time with Harrelson at first.