Cole Gets a Visitor - Shades of Blue Season 3 Episode 4

Cole gets a visitor, only he's unaware that he's not really from Internal Affairs on Shades of Blue. "A Walking Shadow" is the fourth episode of the show's third season.
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Stahl Stalks Harlee - Shades of Blue Season 3 Episode 4

Unbeknownst to Harlee, Stahl continues to stalk her on Shades of Blue. "A Walking Shadow" is the fourth episode of the show's third season.
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Taking Down the Unit - Shades of Blue

Harlee sets her sights on taking down the Intelligence Unit on Shades of Blue. "A Walking Shadow" is the fourth episode of the show's third season.
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Shades of Blue Season 3 Episode 4 Quotes

You think I survived ten years by blabbing to IA?

Harlee

I let her into my head, into my wiring, and once you do that you give up control. The part of you that knows better is screaming at you to walk away but the other part just can't let it go. It's like gravity, the pull is too strong. Some days I feel my sanity slowly slipping away, stolen from me. And yet every time I see her I feel the same rush, that same mixture of nausea and joy.

Stahl