Cher is a straight up savage in this episode, she doesn't hold back with the sass and I love it.
One of the few truly great episodes of this series. You can tell the writers were fans of Sonny & Cher's tv show because they nailed their dynamic
I'm rewatching the series because I bought the Almost Complete Collection, and I'm on episode 9. Gotta say, the lost episodes (Phyllis Diller, Sandy Duncan, Sonny and Cher) are hands down the best ones so far. Not counting The Dynamic Scooby-Doo Affair, obviously. The Batman episodes are the crown jewels of this series.
I was re-watching some of these episodes in preparation for the Guess Who? premiere. I recall thinking this episode was kinda boring, the last time I watched it. I still kinda feel the same way, but there were some good gags in there, and I was a little surprised by some of them, i.e. "You better be married, if you have this many kids" or "Nothing will happen to you on your honeymoon". I don't recall other old Scooby episodes that had quite this kind of jokes. Granted, it made sense given the guest-stars here.
Also, at the start when Sonny says he forgot (well, sorta) the spare tire, it looked like there was one on the side of the car.
I'm guessing there must've been a cut scene of Shaggy and Scooby using that secret elevator at midnight to go down to the cellar to look for more food. Shaggy mentions so later on in the episode and it could be a cool part of the story to see. Shame!