After months of hype and speculation, Barry Allen, aka The Flash, made his debut last week on Arrow's latest episode 'The Scientist'. It was easily the best episode of the season thus far, maybe even Arrow's best episode yet, as Barry Allen's appearance tied into the actual plot of the season rather than being a glorified cameo. It was also a huge improvement over the previous episode 'State v. Queen', an episode which brought back a much criticized villain who was one of the weakest points of season one. The Flash's introduction raises several promising questions not only for Arrow's future, but the eventual Flash solo series which will spin out of these episodes. Let's take a look at the 4 aspects which made this episode one of Arrow's best....
4. Tying The Past And Present Together
The plots from the island and Starling City don't always intertwine with each other, more often sharing similar themes rather than story beats, but much of 'The Scientist' dedicated itself to tying the plots from the island flashbacks to the present together as it was revealed Brother Blood has been attempting to recreate the Mirakuru, or Miracle, serum. Merging the stories together was not only intriguing, but further opened the door for superpowered people to be introduced. It was a surprise to learn the serum Blood has been developing is the same one Ivo was attempting to secure for himself. It raises the question of who exactly Blood is working for if he's attempting to recreate the serum; is Ivo still out there and working with Blood? Is this something the League of Assassins is plotting? It certainly casts new light on Blood's motivations and what exactly he knows, if anything at all, about the island.