This Christmas show is the only single-part episode of Justice League's second season. With Yuletide approaching, the various League members go their separate ways to celebrate the holiday. Superman invites Martian Manhunter J'onn J'onnz (here seen in one of his many earthly aliases) to Christmas dinner with the Man of Steel's earth parents, Ma and Pa Kent; The Green Lantern and Hawkgirl continue to draw closer together, especially during a hilarious snowball fight; and longtime foes Flash and Ultra-Humanite bury the hatchet long enough to help a group of needy orphans. ~ Rovi