Detective Comics Issue 207

"Batman the Magician"
The great magician Merko is kidnapped by a gang "Boss", wanting him to find a way to remove a pair of handcuffs filled with explosive sensitive to vibration from his wrists that were put on him by a rival gang. Batman and Robin substitute for Merko and his assistant on stage until they get a lead to the whereabouts of Merko, and can save him.