"Hunt for Mr. 50"
Batman and Robin trail a jewel smuggler to Hawaii. There they learn that it is a big orginazation controlled by a man know only as Mister 50, beacuse he uses 50 dollar bills to pay his men.
"Lefty Looie"
A 1/2 page humor strip
"The Tinniest Villian in the World"
A crimminal and his gang kidnapp a professor and his invention. They plan to use the professors shrinking ray to pull off "big" jobs.
"The Son of the Joker"
Alfred pens and then gives Bruce a story that may or may not take place in the future. It is a tale of Batman & Kathy Kane marrying and the scion of the Joker.