Sit-com lore and legend

Somebody just posted a bit on efw about the 80s show where the guy lived with his long-lost Mediterranean cousin, and y'know, I can see the faces of both lead actors in my head and I think I even remember the cousin's name (Balki, or something to that effect) but I can't remember the name of the show or the actors or, thank god, the theme song, nor am I sure I really want to remember any of these things - particularly the theme song - although I'm sure it will all come to me sooner or later whether I want it to or not, anyway. All I can think of is The Facts of Life, which of course is an entirely different obnoxious 80s show, although I know a lot of people remember it, or maybe both of them, amazingly fondly. Part of the problem, I think, is that many of the TV comedies of that period had totally unmemorable and conceivably interchangeable names - Family Ties? Different Strokes? Good Times? And it probably makes a difference that I was not a kid of the 80s, either. Alex P. Keaton was not one of my cultural touchstones, y'know? Anyway, I feel like the answers to this are right on the tip of my tongue, but I suspect I'd be happier in the end if I failed to remember. Not a chance of that happening, I know.