The episode description of Welcome to the Front Window airing tonight: "While Calvin is cooped up at home recovering, he begins spying on his neighbors from the window. He comes to believe that something sketchy is going on across the street, so the whole crew helps him figure out how to catch their new neighbor in the act."

They also did a Rear Window spoof in the next-to-last season of the sitcom Get Smart, and in the last season of the sitcom It's A Living. Incidentally, Lynn Borden, who appeared in the Get Smart spoof, also appeared in the last season of the sitcom Hazel with Ann Jillian(n), who was in the first three seasons of It's A Living.

Alf's "Lookin' Thru the Windows":

https://youtu.be/sEtMdSG5tSw?si=wTR1T_-QOCCCGq5O