Appearing in "The Experiment of Professor Zero"
- Professor Zero (Only appearance; dies)
- Beefy (Professor Zero's assistant) (Only appearance; dies)
- Victims of Prof. Zero
- Two Salesmen (Joe named)
- Gotham City
- Gotham Bay
- Parrot Claw
- Paint Brush Floating in the Bay
- Batman & Robin walking dolls
- Parrot Cage
- Glass Jar Cage
- Vacuum Pump
- Pocket Watch
- Pepper Shaker
- Circulating Fan
- Prof. Zero's Yacht
- Delivery Van
Synopsis for "The Experiment of Professor Zero"
Using a reducing ray Professor Zero shrinks wealthy businessmen and extorts them for money. When Batman and Robin begin investigating, Professor Zero shrinks them and imprisons the Dynamic Duo in a bird cage. They escape and try to rescue the captured businessmen. Professor Zero tries to kill them, but he is accidentally killed himself.
The men then seek Zero's antidote to restore themselves to normal. Batman discovers that the antidote is fake. The effects of the ray wear off automatically after three days. Batman then finds the reducing ray which Zero had hidden inside the Bat-Signal.
Appearing in "The Metal Man's Sportsathon"
- Barnum Bane
- Barnum's Gang
- Sports Stadium
- Various Athletic Equipment
- Crook's Getaway Car
Synopsis for "The Metal Man's Sportsathon"
Robotman agrees to put on a sports show for charity. The show's promoter Barnum Bane hires a gang to rob the box office during the show. Robotman stops them, but Bane helps them escape to try again. Before the crooks return, Bane disables Robotman's legs. When the crooks strike the second time, Robotman still defeats them even without his legs. One of the crooks fingers Bane as his employer, and the promoter is sent to prison.
 plot summary at dcindexes.com
Appearing in "A Bicycle Built for Sleuths"
- Joe Mully (Single appearance)
- Mully's Gang (Petey & Slugger named) (Single appearance)
- Mr. Tully (Single appearance)
- Contestants in a bicycle race
- Tandem Town
- Scale Model of a Town
- Various Tandem Bicycles
- Horse & Buggy
Synopsis for "A Bicycle Built for Sleuths"
Slam and Shorty a hired to locate 30 pairs of twins to compete in a bicycle race. The race is part of a publicity stunt to promote tandem bicycles. Joe Mully's gang uses the race to escape after a bank robbery. The crooks are disguises as twins in the race. Slam and Shorty chase down the crooks and bring them in riding a tandem bike.
 plot summary at dcindexes.com
Appearing in "The King of the Animals"
- King of the Animals
- The King's Gang (Trigger named)
- Buster (The King's Dog)
- A Trained Mynah Bird
- A Trained Monkey
- A Trained Raccoon
- Charlie (A Trained Chimpanzee)
- Tiny (A Trained Elephant)
- Sgt. Mike (Policeman)
- Watch Company Security Guard
- Parade Spectators
- Mechanical Mouse
- Crook's Getaway Sedan
- Police Cruisers
- Fire Engine
Synopsis for "The King of the Animals"
A Criminal who calls himself the King of Animals, uses various trained animals to help him and his gang on a crime spree. Capt. Carter and his Boy Commandos take on the task of figuring out how the crook is pulling off such puzzling capers. It is not until a heist goes awry that The King is caught. It turns out his elephant, Tiny, did not perform as he was trained, due to his getting scared by a small mechanical mouse.
"The Experiment of Professor Zero" is listed as Case #1042: "The Pigmy Plot" in Batman's Case Book.
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