The Duo Is Slumming (2) - S2-E32
Trivia: At Commissioner Gordon's office, when Batman is checking the package Puzzler had sent, he's using the Bat-stethoscope to listen intently for ticking. Note how the headphone earpieces of the Bat-stethoscope are placed on the pointy bat ears material at the top of Batman's cowl, and not lower where the man's actual ears are located under the cowl. (00:09:40)