Detective Comics Issue 38

Individuals

 * Batman
 * Robin (First appearance)
 * Anthony Zucco
 * The Flying Graysons
 * John Grayson (First and only known appearance to date)
 * Mary Grayson (First and only known appearance to date)
 * Mister Haley

Locations

 * Gotham City
 * Wayne Manor
 * Batcave
 * Haley's Circus

Items

 * Utility Belt

Vehicles

 * Batmobile