Cheers

From the start of the series, writers and producers made it a point to never show anyone leaving the bar drunk to drive home.

After Ted Danson announced that he was leaving the series, NBC wanted to continue the series by having Woody take over the bar. But Woody Harrelson refused to continue with the series without Danson.

Including the spin-off 'Frasier', Kelsey Grammer played the character of Frasier Crane for 20 consecutive years.