- Satan Girl guesses her Nightflame persona came from some Michael Moorcock novels that Supergirl liked reading.
- Dev-Em's looks remind Kara of James Dean.
- Ronald Reagan makes a cameo appearance during the Apokoliptian War when Mikhail Gorbachov calls him to inquiry what is going on across the pond and what is doing Superman to fix it.
- Kara mentions she never wanted to read The Strange Case of Dr. Jekyll and Mr. Hyde again after her first meeting with Satan Girl.
- John Constantine vows to do something he would never do if God gets Kara and Dev through the War. Like voting for Margaret Thatcher.
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