Batman: The Animated Series' new origins for Mr ... in "Heart of Ice", before returning much later into the series in "Deep Freeze". In terms of continuity, the film SubZero came next (although ...

But all that changed with the advent of Batman: The Animated Series and its critically acclaimed episode “Heart of Ice.” The animated series changed everything about Mr. Freeze from the ground up.

Batman: The Animated Series ... By the end of the series, though, Poison Ivy is one of the few super-criminals that remains ...