Funny You'd never expect a Norwegian to be the first to comment on this one, eh? ;)
Well, I lived in Spain for 5 years (1984-89), and was looking the other day for a Spanish TV show to watch to refresh my Spanish language skills. I found "El Inquilino" and decided to watch it. (Obviously, I can't get Antena 3 in Norway, so the Internet was the only way I could get this).
*Spoilers?*
I suppose it's an OK watch, it's about an alien who gets stranded on Earth, and needs a human body to inhabit to survive. It picks the body of a recently deceased man. Turns out the guy is a writer who was on his way to an apartment complex to live with the other two protagonists of the series, the two girls Mar and Nayra. Eventually, the girls find out who the man they live with really is (he has undergone a severe change of personality, which his publisher finds especially perplexing), and chaos ensues.