I think he played an MD in some little known UK show.
You know, it's been a while... but wasn't that the show where the MD had two "girlfriends" at various times, but one of them got amnesia and he had to leave her, and the other one left with his twin brother? If I remember correctly, he left the series while other MDs came and went but eventually decided to come back and work at the hospital for a little while longer. But he had gone through a lot of changes and was never quite the same, not sure of Who he really was.