Episode Gallery: "Rumors" (Season 4, Episode 11)
Original broadcast date: March 3, 2007 (This episode only features Poison Ivy in several short, silent cameo shots. She has no bearing on the overall plot, and because of this, the episode's description on this post will be extremely short.) A mysterious new vigilante has appeared in Gotham City. The armor-clad Rumor seeks to stop the city's costumed criminals permanently by imprisoning them in his secret warehouse for a mass euthanization. Over the course of the episode, Batman and Robin discover Rumor to be an employee for Paul Karon, an inventor who was crippled by The Joker during an attack Batman had failed to stop. The Dynamic Duo finds Rumor and the missing villains in the warehouse lair, only for all of the rouges to be let loose as a distraction. Knowing that the criminals plan on killing Rumor themselves, Batman and Robin are forced to fend off their many foes in one massive brawl. Poison Ivy appears on a news report's graphic showing the list of missing villain