Oliver is now alone for good. Until he changes his mind and learns the same lesson he does 2 times every season. Meanwhile, mafia stuff and corporate stuff. The episodes are actually quite fun, but the trailers and synopses are super boring. They need better marketers. Let’s react!

Info: DIAZ SETS HIS SIGHTS ON THE QUADRANT — Looking to expand his empire, Diaz (guest star Kirk Acevedo) and Laurel (Katie Cassidy) meet with The Quadrant, a coalition of mafia families who run national organized crime. Meanwhile, after Oliver’s (Stephen Amell) recent decision, Felicity (Emily Bett Rickards) and Curtis (Echo Kellum) double their efforts on building Helix Dynamics. Gordon Verheul directed the episode written by Spiro Skentzos & Elizabeth Kim (#619). Original airdate 4/19/2018.