This episode starts with "My name was Oliver Queen." instead of the usual "My name is Oliver Queen."
Al Saheem roughly translates from Arabic as 'The Arrow'
Oliver tells Diggle to meet him at a warehouse at Fullerton and Halsted. Fullerton and Halsted is a real intersection in Chicago, Illinois, best known as the location of the former Biograph Theater, where legendary bank robber and gangster John Dillinger was killed.
In this episode Ra's Ah Ghul mentions Damien Darhk started his own organization where he has access to a hive of agents, this is a reference to HIVE of which Damien Darhk was a member
At the beginning, two cars have licence plates starting one with SC (as in Starling City) , the other one with CC (as in Central City).