What is the name of the episode where Ritchie invites all the kids to his birthday party?

Ep #78, "HAPPY BIRTHDAY AND TOO MANY MORE".

Steve

Steve, as usual, is correct. :)

The "Happy Birthday" ep., btw, was one of a very, very few VD Shows not filmed in front of a live audience. There's canned laughter used for that one. And the reason for this is: it was filmed on Tuesday, November 26, 1963, just one day after assassinated President John F. Kennedy had been laid to rest at Arlington Cemetery, and Carl & Co. figured it was better to not use a live audience for that show, with the obvious thought in mind of: Who's gonna feel like laughing this soon after such a tragedy?

Perhaps that's part of the reason it is one of my very least-favorite episodes of the 158. The script is pretty bad too.

"Somebody untie that kid!"

That's very interesting. I didn't know that. I do enjoy this episode.