On Christmas Eve, he first appears breaking into Blackgate Prison with Killer Croc, kidnapping and later killing Commissioner Gillian B. Loeb with Calendar Man's aid before escaping on a helicopter, allowing Killer Croc to stay behind and fight Batman.
He first appears breaking into Blackgate Prison with Killer Croc and later killing Commissioner Gillian B. Loeb with Calendar Man's aid before escaping on a helicopter, allowing Killer Croc to stay behind and fight Batman. This is on Christmas Eve. Killer Croc is kidnapping.