Slade promised to kill the person Oliver loves the most and he's holding Felicity hostage. He's seen what we've seen as shown in this photo from the Arrow Season 2 Finale, "Unthinkable."
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We'll learn if Laurel survives a Mask's hands in the Arrow Season 2 Finale, "Unthinkable."
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Slade seems to be making a point in this photo from the Arrow Season 2 Finale, "Unthinkable."
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Canary has a gun and here's betting she's not afraid to use it in this photo from the Arrow Season 2 Finale, "Unthinkable."
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So Slade finally gets off the couch? Something tells me he might wish he had stayed in the comfy chair. Arrow doesn't look happy in this photo from the Arrow Season 2 Finale, "Unthinkable."
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Oliver is still unsure, but we know that the Arrow is filled with light in a dark world. This is a photo from the Arrow Season 2 Finale, "Unthinkable."
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Arrow isn't holding back his feels in this photo from the Arrow Season 2 Finale, "Unthinkable."
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Arrow takes aim in this photo from the Arrow Season 2 Finale, "Unthinkable."
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Arrow Season 2 Quotes

Laurel: Helena, you don't have to do this.
Helena: Yes, I do. Because once you let the darkness inside, it never comes out.

You know Oliver, somebody once told me that secrets have weight. The more you keep, the harder it is to keep moving.

Diggle