Which sitcom featured a friendly alien from Melmac?

I never saw it, it may not have reached the UK. However, I hope he didnt go round killing and eating cats.- that would have been loathsome.

I only watched it because I had a crush on the girl with the braces. 🥰

I liked the show but it must of been real hard for the actors to act along side Alf. I give the actor who played and all the cast a lot of credit….