Directed by: Tim Burton
Starring: Christopher Walken, Michelle Pfeiffer, Danny DeVito, Michael Keaton, Michael Gough
Continuity mistake: In the opening, Penguin's parents look at the cage holding him. From the outside, his shaking is making the cage move slightly side to side. From inside, his shaking is not moving the cage at all.
Continuity mistake: When Oswald Cobblepot is in his crib as a baby, in outside shots the rubber duck on the string is swaying back and forth. In shots through the crib bars, it is dead still. (00:01:00)
Visible crew/equipment: After Batman and Catwoman's mistletoe banter, a wire can be seen attached to his back as he glides off the rooftop. (01:20:15)
Selina Kyle: Ok, Intimidate me, bully me if it makes you feel big. I mean it's not like you can just kill me...
Max Shreck: Actually, it's a lot like that.
Trivia: Annette Bening was cast as Catwoman but after becoming pregnant was replaced by Michelle Pfeiffer.
Answer: Nothing was stopping them. After Penguin's true nature was revealed, they most likely started searching the entire sewer system but couldn't find where his lair actually was so they had no choice but to give up.