"The Minstrel's Shakedown"
The Minstrel tries to extort money from the members of the Gotham City Stock Exchange. With his electronic genius he is able to cause stocks to rise and fall on a whim. If each member agrees to pay $1,000 per week, he can guarantee them immunity from such problems in the future.
During a late night stakeout of the Gotham City Stock Exchange, Batman and Robin are mistaken for a replacement janitorial crew.
Another culinary confinement for the caped crusaders!