Swamp Thing has a blind date with Poison Ivy, which leads to her controlling him in her plot to overrun Gotham City with plant. It is up to Batman to find an antidote to free Swamp Thing from Poison Ivy's control. Meanwhile, Poison Ivy is collaborating with Harley Quinn to help her keep Swamp Thing in check. So Superman, Firestorm, and Vixen work to fight Poison Ivy and Harley Quinn on their home turf.
Elenco: Jason Lewis , Joanne Spracklen , Mark Hamill , James Woods , Diedrich Bader , Carl Reiner , Sean Astin , Rachel Kimsey , Patrick Seitz , P. J. Byrne , Michael Dorn , Brent Spiner , Tara Strong , Khary Payton , Josh Keaton , Armin Shimerman , Armin Shimerman , John DiMaggio , Ken Jeong , Dana Snyder , Kevin Conroy , Oliver Vaquer .