Justice League Unlimited  Season 1 Episode 19  Injustice For All
(2)       • Trivia      • At the end, Ultra-Humanite is watching
what is definitely Madame Butterfly. The implication is
definitely that he's watching the last scene where the female
singer finishes her song and just...stands there. But in the
opera, Cio-Cio-San (Butterfly) kills herself and dies in Lt.
Pinkerton's arms as he cries her name.      • When Superman
interrogates Copperhead, you can see his reflection in the one-
way mirror behind him. Superman thrusts his head into
Copperhead's face, but his image in the mirror doesn't move.
• At the end of the episode, we see both Copperhead and Cheetah
in the paddywagon with the other members of the Injustice Gang,
even though Copperhead was already arrested and in jail while
Cheetah was presumed dead. Bruce Timm once noted their (the
producers') original intent was that Grundy killed Cheetah; but
when this mistake was shown to them, they decided that it was
easier to say she was never killed