I'm wondering if "Grape Balls Of Fire" is a typo?
No. It's part of a running gag from the Dennis Quaid episode. Pepe and Seymour want to sing a song with him, but they don't have an idea for what. Then, Seymour's "grape balls" dish catches fire in the kitchen, leading the the song. The same thing happens twice later (such as "Greg Hall's a Flyer" and "Great Boil's on Fire").
Also, I just heard the 3-2-1 Contact Theme, which I haven't heard on the Radio. I've been hearing many repeats over the last few days, but it's nice when something new sneaks in.