"The Duo Is Slumming"
Puzzler steals the Retsoor's blueprints from Artemis Knab's penthouse safe while Batman and Robin return to Gotham from their balloon ride. But Puzzler leaves one clue too many in the penthouse, and they are able to intercept him at the airport before they can make off with the jet.
Batman quotes Hamlet to Artemis Knab in a horrible British accent.
The Gotham Herald's Birding section saves another pair of lives.