Anyone Watching The Flash and Arrow?

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Is there anyone on my f-list who is watching The Flash and has also watched Arrow. I've never watched Arrow, but in episode 104 there's a character named Felicity that obviously has a history of some sort with Barry. They showed a couple flash backs that definitely are not from The Flash. So what's the deal there? I really don't want to watch Arrow, but if there is an episode or two of Arrow that kind of introduced the character of Barry and had him interacting with those guys, what episodes were they so I can see if I can watch them and fill in the gaps?