The Girl of Steel

Batman and Superman look on while Supergirl rescues Air Force One, as the Calculator also looks on. Supergirl zooms away, losing Superman, then notices the Calculator's satellite, and confronts Batman. She meets up with \"Batgirl,\" fights Poison Ivy and Harley Quinn, and proves invulnerable to synthetic kryptonite. Batgirl is revealed to be Clayface, and Supergirl defeats him. It turns out that Lex Luthor is behind the Calculator's monitoring of Supergirl and been testing her.