Iron Man: The Animated Series - Season 1
An offhand remark by Mayor Hill on television spurs the Joker into sneaking onto his estate disguised as a clown at the birthday party for Hill's son, Jordan. Joker plants a bomb, but Bruce Wayne, who is attending the party, manages to defuse it. However, Jordan, who is angry at his father, runs away hiding in Joker's van.
Episode: 13 eps
Duration: 26 min