"The Duo Defy"
With his skating rink hideout compromised, Freeze returns to his iceberg hideout. He then delivers a threat to the U.S. president, warning that he will make an example of an entire city, and then freezes Gotham City with the stolen formula. Batman asks Gordon to release the homing seal, and then follows it back to Freeze's hideout via Batcopter.
We learn that Batman carries live fish in his utility belt.
First, Mr. Freeze froze Batman and Robin. Then, he tried to freeze them. And now...