"Hello, Mrs. Arcola"

I feel like there's a good episode potentially here, maybe with sharper writing.  After a year of dating, Chachi still hasn't had Joanie over to his "house" (apartment) or introduced her to his mother.  So Fonzie invites the Cunninghams over and mild havoc ensues.  There are some sort of sweet moments, so I'm going with a C+.

Notes:

• Somehow how both The Blob and Psycho are playing at local theaters, and "Surf City" is playing at Arnold's.
• Chachi says Richie has his own room even though he's not living at home, but I thought they turned Richie's room into Roger's?  I never see Roger sitting at the Cunningham dinner table, so maybe he just stayed there temporarily.
• Potsie is apparently living in the apartment without Ralph, and there's a not quite subplot where he and other Psych students are studying how Fonzie picks up girls.
• Jenny is actually still dating Eugene but is ashamed of him.  Their ship name is probably Eugenny and I think I'm starting to understand why, like so many other shows' Season Eights, this one was a shock to fans and even casual viewers.
• I know J. J. Barry best as Janet's boss at the flower shop on Three's Company.  Although he's playing Chachi's live-in Uncle Gonzo here, he would not return to this show.
• On the other hand, Ellen Travolta (yes, John's older sister) would devote much of her career to playing Baio's mother, here, on JLC, and on Charles in Charge.  She does well in the role of widowed landlady Louisa Arcola, even if it's basically an Italian mother stereotype.