"The Devil's Fingers"
Batman and Robin are knocked unconscious by Harry's piano movers and tied up. They then put them on a large conveyor belt that leads into a huge piano roll machine. When Harry starts the machine, they start moving toward the inside of the machine, about to be perforated by the giant needles.
"Holy sour note! How will this music end?"
Batman tells Robin to start singing as loudly as he can. Their voices drown out the music from the piano which was playing the music that was to be transferred onto their bodies. By selecting the perfect pattern of notes, Batman is able to divert the needles to punch an outline around their costumes.
A concert pianist and his evil twin brother set their sights on Aunt Harriet!