Here's a fun tidbit from my interview with Chris Matthews that I, um, forgot to mention in my earlier story about him: His son, Thomas, is an actor, and he has a role in Aaron Sorkin’s upcoming HBO series about cable news talking heads, “More As This Story Develops.” Matthews fils plays a producer on a program not unlike “Hardball,” although the lead character, played by Jeff Daniels, is said to have more in common with Keith Olbermann.

It’s also funny, though, because Matthews himself reportedly agreed to make a cameo on the show, only to back out after his bosses at MSNBC denied him permission. According to Vulture, they worried that the show might present an unflattering view of the network and/or cable news and/or left-wing media. That marked an about-face, since earlier, MSNBC had been helpful to Sorkin, allowing him to spend time on the set of “Hardball” as research.