Justice League Action (2016)

S1E20 Freezer Burn

Mr. Freeze takes to the skies in his aircraft, intent on encasing all of Gotham City in ice, using Killer Frost as the source of his chilling power. As Batman confronts Mr. Freeze to thwart his plan, Firestorm finds himself tasked with rescuing Killer Frost. Amid the chaos, he unexpectedly develops feelings for her, adding a complicated twist to the mission.