User blog comment:Fearless Diva/Barry Allen and... Felicity?/@comment-9843739-20131106152337/@comment-24034641-20131106164715

Not yet, he appears in episodes 8, 9 and 20, and it's eps 9 or 20 when he gets his powers, don't remember what the interview said exactly, as Andrew and Geoff were talking about how it'd fit in with the Arrow universe