Deliberate mistake: Whenever Deathstroke is on screen, he has three grenades for a launcher strapped to his chest. But on closer inspection, you can see these grenades are actually BB-gun grenades: You can tell by the very distinctive holes at the tip. They did this because launched grenades are A) very expensive and B) not very safe to walk around with on set. A few of the most noticeable times are when Yao Fei is fighting him when he is freeing Oliver in episode 5 and when Oliver is talking to him in episode 14.
Arrow (2012)
1 deliberate mistake in season 1
Starring: Katie Cassidy, David Ramsey, Stephen Amell, Colin Donnell, Emily Bett Rickards
The Magician - S3-E4
Revealing mistake: When Oliver meets Thea at the Grind and Jot Cafe (Which looks unsurprisingly like CC Jitters) you can see the cups on the table are from CC Jitters. (00:20:50)
John Diggle: The knife.
Oliver Queen: Right. The knife. I got lucky.
John Diggle: That was a kitchen knife. It wasn't even weighted properly and yet you threw it with accuracy across a ten foot room.
Oliver Queen: Exactly. I got lucky.
More trivia for Arrow
Question: Is this show going to be a part of the Justice League universe DC is creating with the Man of Steel? I'm just wondering, because A) The Green Arrow has been a member of the Justice League in the past and B) they haven't done anything yet in the show to deny or confirm that it's going to be part of that.
Chosen answer: There is no evidence at this point to suggest that this is the case. Most indications at this point suggest that Green Arrow is not under consideration as a likely character for any proposed Justice League movie.
Tailkinker ★