The Joker inadvertently gets his hands on the Mask of Loki after it is found in a Gotham City museum. With its power the Joker begins to feel a new rejuvenation in his career of crime. Lt. Kellaway finds his way to Gotham and helps Batman and Commissioner Gordon in defeating the newly superpowered Joker. Batman is able to trick the Joker into removing the Mask by claiming that the villain is no longer funny, and is relying on tired schtick and the power of the Mask instead of his own style. It is worth mentioning that the Joker himself had enough will power to "emerge" from the Mask's body (resulting in a two-headed being) in order to remove the mask on his own. Lt. Kellaway asks Batman to give him the Mask. Batman agrees and the Mask is last seen as Kellaway digs up Stanley Ipkiss' grave