Batman: White Knight stopped with a fist, i.e. Batman's methods. This led him to turn the Joker into a politician, using the character's intelligence and charisma to win the people of Gotham over. DC Comics had no problems with the ideas that Murphy had for the series such as changing the timeline in Batman's history. However, the adult content like nudity and profanity that Murphy had intended to include were not permitted. Murphy revealed that the Joker in "White Knight" has the real name Jack Napier, a callback to Tim Burton's 1989 "Batman" film where the Joker played by Jack Nicholson also shares
Christmas with the Joker on a loose roller skate and topples over the catwalk railing. Batman grabs him by the leg, narrowly saving him from plunging into the vat. Batman sneers, "Merry Christmas, Joker", to which Joker angrily retorts, "Bah Humbug". Bruce Wayne and Dick Grayson retire to Wayne Manor to watch a taped copy of "It's A Wonderful Life", given to them by Commissioner Gordon. Upon being told by Dick that "it IS a wonderful life", Bruce admits that "it...has its moments". The episode ends showing Joker spending Christmas in a straitjacket, alone in his cell. However, being the Joker, he remains upbeat,