We have already seen...
2 giant plexiglass cones are used in :
- The Clock King's Crazy Crimes / The Clock King Gets Crowned ( The Giant Hourglass )
- The Cat's Meow / The Bat's Kow Tow ( Catwoman's Echo Chamber )
- The Contaminated Cowl / The Mad Hatter Runs A Foul ( The X-Ray Accelerator Tube and Fluoroscopic Cabinet )
- Green Ice / Deep Freeze ( Giant Frosty Freezies Maker )
The Same Chairs are used as electrics chairs in :
The Joker Goes to School / He Meets his Match, the Ghrisly Ghoul and in The Greatest Mother of Them All / Ma Parker
Minerva calls Bruce Wayne using the same phone with which the Siren called him.
The large golden cat statues which were in most, if not all, Catwoman episodes as well as a few King Tut eps.
The famous question mark and stamp boxes from Riddler and Col. Gumm are in the background of the last Batfight in Batman's Waterloo and in several later episodes
The cauldrons used by aunt Hilda are also used in the Sandman episode where he marries J. Pauline Spaghetti.
Penguin's G.O.O.N headquarter was in the same basement set as the hideout of Marsha's Aunt Hilda.
The BatTrap where Harry ( Chandell's Twin ) is putting the duo through the '' Player Piano Paper Puncher '', which is used the following week as the '' Penguin's Litterature Packager '' during Penguin's campaign for mayor and it was cannibalized for the "Enlarged Perforating and Coiling Machine" in A Piece of the Action / Batman's Satisfaction.
Tut's original sarcophagus (REALLY wide with the strange face) appeared in another, non-Tut episode, but we cannot recall which one.
The toy "Gayfellow" truck appeared in another episode on, we believe, Batman's desk in the Batcave.

