I'm knowledgeable about useless stuff It definitely makes watching the show more fun, but yea it's still a good show either way. I checked out Once Upon a Time a while back on Netflix but I already have way too many shows to keep track of before I add another one.
Wow you are very knowledgeable on DC characters. I am sure if I was I would find the show a lot better because I see the references. I still like Arrow a lot. I need to catch up on the next episode but right now I am watching Once Upon a Time and I love it! I finished the first season a while ago, but now I am watching the second season and it's awesome.
ALSO... H.I.V.E., the people who hired Deadshot to kill Diggle's brother have been associated with Talia al Ghoul, daught of Ra's, leader of the League of Assassins, and also to Slade Wilson and Adeline Kane, his future wife. So they can take a number of roads with them.
Well the guy in the cell next to him is the same guy who helped him out in the most recent episode AND the guy who got him into the Russian Mafia. He's KGBeast in the comics, but obviously he and Oliver are pretty buddy-buddy in the show. The Dr. guy on the ship is Professor Ivo, who makes evil androids in the comics (one of which is Amazo, which is the name of the ship he's on). Judging by why he's looking at the island though, I think he'll end up using the Japanese bio-weapon thing he's looking for instead of making androids, and Slade will be his first test subject. It's supposed to enhance the strength of soldiers and stuff, like the super soldier serum for Captain America, which is kind of how slade is tested on as Deathstroke.