A really nice episode that improves on the already-quite-good first installment in pretty much every way.

Jack works a lot better once he's integrated into the main plot - he actually fits in quite seamlessly. He's still not quite as charming as he's clearly meant to be, but I think it's a big step up from last episode.

The "go to your room" bit is a lousy way to solve a cliffhanger that I nonetheless find very amusing. I'd also completely forgotten about the banana gag. Good stuff.

Jack suggests Pompeii on volcano day as a good place to visit if you're running a con. Hmm...

Nancy continues to be an outstanding character, balancing vulnerability with authority and toughness. Her confrontation with the owner of the house works really well, though it bumps up against problematic-yet-appropriate-for-the-era topics.

We get our first mention of Villengard, the weapons manufacturer that gets occasional shout-outs to this day.

The two-parter as a whole manages to seed its major plot developments - the nanogenes and Nancy secretly being Jamie's mother - without making it glaringly obvious - no small feat.

And, of course, we get the "everybody lives" monologue. It's iconic for a reason.