Harley Quinn Annual: DC² — DC Comics
Issue: #1
When Harley discovers that Ivy is being held captive in Arkham Asylum, she decides to help her out-by breaking in! NOTE: This special DC2 edition features new gags, pop-up effects, and many more enhancements unique to the digital version!
Creators: Kelley Jones, Paul Mounts, Dave Wielgosz, Mark Doyle, Stjepan Šejić, Chris Conroy, Ben Caldwell, John J. Hill, Jimmy Palmiotti, Amanda Conner, John Timms, Rico Renzi, Michelle Madsen, Joe Quinones
Characters: Batman, Joker, Jeremiah Arkham, Killer Croc, Poison Ivy, Two-Face, Big Tony, Catwoman, Egg Fu, Harley Quinn, Queenie, Penguin, Mad Hatter, Clayface (Karlo), Mr. Freeze, Riddler, Hugo Strange, Alec Holland, Ferdie, Shauna Belzer