Oliver grabs Barry by the throat in this episode of Arrow. It's titled "Three Ghosts."
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Grant Gustin and Stephen Amell in the CW hit series, Arrow.
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Grant Gustin appears here on Arrow as Barry Allen. He made his presence very strongly felt on the series.
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Oliver has drug induced visions after a a fight with Cyrus Gold on Arrow. "Three Ghosts" is the ninth episode of the show's second season.
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Arrow Season 2 Episode 9 Quotes

Never meet your heroes, right?

Felicity

Oliver: You told him who I am.
Felicity: Yeah, I did.
Oliver: That's not your secret to tell, Felicity. I decide who finds out my identity.