The Creeper is a frequent ally to Batman and has been a recurring character in that hero's stories. Outside of comics, the Creeper has appeared in the TV shows "The New Batman Adventures" and ', and appeared in his civilian identity Jack Ryder in the ' video game series. The Creeper shares visual similarities to the villain the Joker, but originally no connection was intended and the two characters did not meet until 1975, seven years after the Creeper's debut. The animated series "The New Batman Adventures" connected the Joker to the Creeper's origin in the 1995 episode "Beware the Creeper." The 2006 comic book miniseries "The Creeper" (vol. 2) followed suit by revealing the Joker's signature poison was one of several agents used by Dr. Yatz to first transform Jack Ryder into the Creeper.