Everybody remembers the juggernaut that NBC’s long-running ER was, but NOT everyone remembers the short-lived sitcom by the same name from the mid-1980s (don’t click these yet).

What’s fun about this is that George Clooney had roles in both of them. Obviously it’s his turn in the later show as Doug Ross that made him GEORGE CLOONEY; in the sitcom, he was a mere (recurring! not regular cast!) ER tech (which makes sense – he was only 23 at the time).

The question I put to you, anonymous reader, is this: What other famous actor appeared in multiple episodes of both ERs?

(The Wikipedia link for the 80s show gives it away, so think hard before clicking.)