Supergirl celebrates her 21st birthday in this episode.
The romantic tension between Supergirl and Brainiac 5 is reflective of the relationship shared between the two during the Pre-Zero Hour incarnation of the Legion of Super-Heroes.
The scene where John Stewart cradles the unconscious Supergirl in his arms is reminiscent of the cover to Crisis on Infinite Earths #7, which featured the death of the Earth-One Supergirl.
See Also
Images from Justice League Unlimited (TV Series) Episode: Far From Home
"You get right back here and finish this article, young man!"
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Now... this boy Kara likes so much – does he have a name? 
