Trivia: When Barry and Oliver are fighting on the street, a police officer asks for backup and mentions Burton and Nolan street, as reference to Christopher Nolan and Tim Burton.
Trivia: Although Laurel is a couple of years older than Sara, Katie Cassidy is only about a month older than Caity Lotz.
Trivia: In season 2 flashback scenes, The Butcher is played by Ron Selmour. Selmour played Marcos in the series "Smallville." Marcos was on the island with Oliver Queen and captured him, with plans to ransom him.
Crisis on Infinite Earths: Part Four - S8-E8
Trivia: When Barry/Flash is in the Speed Force, he meets another Barry/Flash. This other Flash is played by Ezra Miller who plays Flash in the 2017 film "Justice League."
Trivia: While Nora is looking the ice gun the mask of Bane from The Dark Knight Rises can be seen.
Trivia: Batwoman lands on the van in in a similar way to Batman in The Dark Knight.
Trivia: The black suit wore by Superman is the same seen in The Return of Superman comic book.
Suggested correction: When Diggle is walking away from Felicity, he is still talking to her but it looks like he is talking to Nyssa.
Stephen Edmonds 1
People have already tried to correct this mistake. It is valid. In the scenes prior, Nyssa says Oliver will do what it takes to kill her and Oliver says "tonight, Nyssa Al Ghul faces justice." Nyssa is there to bring the team the news that Oliver is going to try to kill her. Felicity says "Oliver wouldn't", meaning Oliver wouldn't try to kill Nyssa. Diggle says "I think what she's [she being Felicity] trying to say to say is that Oliver would never do anything to hurt you" [you being Nyssa whom Oliver is going to try to kill]. He is meant to say "Nyssa." Otherwise the entire line means Nyssa or Laurel are there to convince Felicity that Oliver would never do anything to hurt Felicity.
Bishop73