Trivia: Oliver asks Clark "who are you?" and he responds "a friend", that line was taken from Superman the movie while Clark and Lois are talking.
Trivia: There is a reference to Smallville TV show in the opening scene among the heroes - Green Arrow played by Justin Hartley is lying on the ground.
Trivia: The music made by Danny Elfman for Batman and The Flash movies can be heard in Gotham city.
Trivia: Elizabeth Tulloch, who plays Lois Lane, is married to David Giuntoli, with whom she starred on Grimm, and who had auditioned to play Clark/Superman in Man of Steel.
Trivia: Sherloque develops a crush on Renee Adler, a clear play on "Irene Adler" from other Sherlock Holmes media. Although only appearing in one book, in TV shows/movies Irene is frequently a love interest of Holmes.
