Abetted by a mad scientist cellmate, Joker's plans for a flying saucer (to help take control of the world) are underway. The Dynamic Duo are trapped in the Batcave from an explosion by a time bomb placed in the Batmobile by one of Joker's henchmen. Another episode so crazy it must be considered satire- a parody of the show itself. Alfred the butler is forced to build a flying saucer so Joker and his gang can take off for outer space. BatBits: The comic book version of Bat-Girl was teen-ager Betty Kane, niece of heiress Kathy Kane (secretly Batwoman). This hyphenated Bat-Girl first appeared in Batman #139 (April 1961) and lasted just under three years. Joker has plans, drawn up with the aid of a mad-scientist cellmate, for building a flying saucer in which he proposes to sweep across the skies, calling on the world to submit. He sends his henchmen to the Metals Research Wing of the Wayne Foundation to steal the rare light-weight beryllium stored there. Barbara changes into her Batgirl gear to race off to protect the rare metal. Batman and Robin head for the same place, but a bomb explodes, filling the Batcave with green smoke.