Isabel looks concerned in this conversation with Oliver on Arrow. "The Scientist" is the ninth episode of the show's second season.
Added:
What is Isabel up to on Arrow? "The Scientist" is the ninth episode of the show's second season.
Added:
Oliver and Moira must figure out an impossible robbery on Arrow. "The Scientist" is the ninth episode of the show's second season.
Added:
A robbery shakes things up at Queens Consolidated on Arrow. "The Scientist" is the ninth episode of the show's second season.
Added:
Oliver works with police scientist Barry Allen on Arrow. "The Scientist" is the ninth episoe of the show's second season.
Added:
Grant Gustin premieres here on Arrow. He portrays Barry Allen.
Added:
It's Grant Gustin as Barry Allen! The actor makes his debut on "The Scientist."
Added:
Welcome to Arrow, Grant Gustin. This is a photo of the actor as Barry Allen.
Added:

Arrow Season 2 Episode 8 Quotes

Barry: I'm guessing you don't know how hard it is to break someone's neck.
Oliver: Hm? No. No idea.

Barry: Actually, it was only one guy. I'm sorry I'm late. My train was late. Actually, the second one. The first one I did miss, but that was my cab driver's fault. I have this great traffic app and he thought that he was right. But, I'm here now though.
Lance: Great, who the hell are you?
Oliver: And do your parents know that you're here?
Barry: I'm Barry Allen.