"The Cunningham Caper"

This episode starts off slow, but it gets pretty funny when Richie, Potsie, and Ralph have to match wits with the burglar (Herb Edelman, who would show up as a different sort of crook on Blansky's Beauties, as well as of course as Dorothy's ex on The Golden Girls, and many, many other roles).

Some notes:

• Joanie wanting to see her friends vomit is a little strange.
• Richie refers to his brother as well as his sister.
• I knew that as soon as Fonzie slid a slice of pizza under the closet door that the Burglar would complain that there either were or weren't anchovies, because that's how sitcom dialogue works.
• We see a toilet, and indeed much of the Cunningham bathroom in this episode.
• Potsie pretending to be 25 is ironic, since Anson Williams was 25 by this point.
• Ralph jokes about going to dental school, and his father would later turn out to be a dentist.
• This is the first of four HD episodes written by Mike Weinberger, who'd do one for L & S and three for Three's Company.
• His cowriter here, James Ritz, would do five for HD and one for Three's Company.
• George Tyne would direct two more for HD, and his other credits include The Brady Bunch, The Bob Newhart Show, and M*A*S*H, among other shows I've watched.
• I wouldn't swear to it, but I think this is the first episode with "Cunningham" in the title.