Trivia: Throughout the show, the number 47 appears many times. There are multiple room 47's (where Syd found the Circumference in season 1 and the room in her memories from season 3, among others.), there are 47 Rambaldi artifacts, and Page 47 of the Rambaldi manuscript was the page that had Sydney's picture on it. Also the pagers flash 47911 when they get called into the office.
Trivia: When Batman whispers something to Deadshot and Deadshot says he'll tell, Wonder Woman asks Superman what Batman said with Superman saying she doesn't want to know. In an interview, Kevin Conroy stated that what he whispered was, "I know where you live, Floyd."
Trivia: Lou Diamond Phillips made two appearances on the show, as Mark DeSalvo, the security chief where Victor Drazen is being held. Philips and star Kiefer Sutherland are known for having worked together in Young Guns and Young Guns 2.
Trivia: A film reference to Star Trek: First Contact: Archer says something about a group of cybernetic creatures (The Borg), that tried to stop Cochrane from launching his mission into space that was stopped by a group of humanoids, that were also from the future (USS Enterprise NCC 1701-E).
II (The Samurai called Jack) - S1-E2
Trivia: Some of the dogs working at the mine look like ones from "2 Stupid Dogs".
Trivia: In the movie, a soldier called Petronius unsuccessfully tries to murder the emperor Valentinian. The name "Petronius" was probably chosen because in reality the emperor was eventually killed by a senator called Petronius.