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Joker's video threat about the sonic bomb was featured in the Batman Beyond movie Return of the Joker where Bruce uses it as a voice sample for comparison, with Joker's face reedited to match the movie's Joker.
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This episode is based on a special holiday-themed issue of the "Batman Adventures" comic book, a title based on Batman: TAS. The episode dramatized all but one story featured in the comic book, one that involved Mr. Freeze. Since the animated series had wrapped up the Mr. Freeze storyline involving his wife in the movie Subzero, the story was left out of this episode.
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Mark Hamill (The Joker), Ron Perlman (Clayface), Arleen Sorkin (Harley Quinn), Diane Pershing (Poison Ivy), Marilu Henner (Veronica Vreeland) and Liane Schirmer (Detective Renee Montoya) all reprise their respected roles from various Batman: TAS episodes.
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Most of the regular cast return from Batman: TAS. However, Tara Strong (listed in the credits as Tara Charendoff) takes over the role of Barbara Gordon/Batgirl from Melissa Gilbert, who played the role in several episodes of the original series.
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Clearly this episode was meant to air after "Sins of the Father," which is when Tim Drake assumes the role of Robin.
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On December 13, 2003, Cartoon Network aired this episode as the second "part" of a one-hour Christmas special with the premiere of a one-part half-hour Justice League Christmas episode, "Comfort and Joy."
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Alfred is absent in this episode.