Poisonous

Poisonous is the eleventh episode of the fourth season of NBC's The Batman. It first aired on February 27, 2012. It is the fiftieth episode overall.

Synopsis
Barbara decides to take Poison Ivy one-on-one, but things go badly when Ivy reveals that she is just the distraction. Bruce, Alfred, and Gordon get trapped into the Bat-cave when Jervis, Clayface, and Croc have finally set their plans in motion, forcing Clark to trust Ra's in order to save their mutual friend: Bruce. Harley and Two-Face decide to kill the Joker to stop him from chasing them back to Metropolis. Meanwhile, the Riddler is bent on killing Harley to get Two-Face.

Starring

 * Ben Affleck as Bruce Wayne/Batman
 * Sarah Hyland as Barbara Gordon/Batgirl
 * Zen Gesner as James Gordon
 * Nathan Gamble as James Gordon Jr.
 * Jared Leto as the Joker
 * Keri Lynn Pratt as Cat Grant
 * Brian McManamon as Basil Karlo/Clayface
 * Tom Hardy as Victor Payne/Bane
 * Maggie Geha as Pamela Isely/Poison Ivy
 * Tyler Hoechlin as Clark Kent/Superman
 * Cory Michael Smith as Edward Nygma/Riddler
 * Floriana Lima as Maggie Sawyer
 * Nolan North as Thomas Elliot/Hush
 * Andrew Stewart-Jones as Chris Allen
 * Benedict Samuel as Jervis Tetch/Mad Hatter
 * Cillian Murphy as Jonathan Crane/Scarecrow
 * Adewale Akinnuoye-Agbaje as Killer Croc
 * Liam Neeson as Ra's al Ghul
 * Nicholas D'Agosto as Harvey Dent/Two-Face
 * David Zayas as Sal Maroni
 * Thomas Haden Church as Cameron van Cleer/Killer Moth
 * Margot Robbie as Harley Quinn
 * Stephen Amell as Oliver Queen

Guest Starring

 * Jake Thomas as Ben Scott
 * Jeremy Irons as Alfred Pennyworth

Trivia

 * This episode achieved 14.91 million U.S. live viewers.
 * Floriana Lima, Nolan North, Cillian Murphy, and Stephen Amell do not appear in this episode as Maggie Sawyer, Tommy Elliot, Jonathan Crane, and Oliver Queen.
 * This episode received mixed reviews. It scored a 65% on Rotten Tomatoes, a 79 out of 100 on Metacritic, and 6.1/10 on IGN.
 * Guest stars in this episode include Jake Thomas and Jeremy Irons as Ben Scott and Alfred Pennyworth.
 * This episode is rated TV-14 for D-S-V.