TIL that before George Clooney starred in the TV-show ER, he was on a different TV-show that was also called ER.

https://www.thelist.com/1299434/little-known-sitcom-george-clooney-showbiz-start/

https://www.reddit.com/r/todayilearned/comments/15lleu3/til_that_before_george_clooney_starred_in_the/