The Intelligence Unit's worst nightmare, El Pulpo, returned on Chicago PD Season 1 Episode 13. 

Along with Pulpo's list of demands came a shocking cliffhanger, as the CPD made a deal with the devil to catch the rest of the drug cartel. 

Watch Chicago PD Season 1 Episode 13 Online

Much like the series premiere echoes, the losses are paid in blood. Pulpo is given free reign to do as he pleases from the cell and is able to easily manipulate one cop into making sure he honors his word. This leads to the deaths of officers, along with Dawson bleeding out on the street. 

It's unfortunate that in a room full of cops, no one could see Pulpo reach into his baby mama's jacket, nor did anyone acknowledge the possibility of Pulpo continually pulling all of these strings right under their watch.

Relying on emotional appeals with Pulpo will not work; the man has shown that he's going to do what he needs to do no matter what the human cost. 

Stillwell is back in the picture, bringing along quite a few reveals. The first is that Sumner is not the mole, yet Jin is. With Jin not having a very big role in the series as it is, this is finally a chance to see him integrate with the rest of the stories.

It's an explanation for why he keeps his distance from most of the unit, too. We've always been assuming that Jin has a different role and office within the unit, but part of the reason he's kept his distance is because he's the mole. 

The other big reveal does involve Sumner: she and Stillwell are enjoying quite the affair. What's interesting is her conversation with Stillwell ends up pushing him towards Voight's shady dealings.

She knows he's going to go lose a lot of cash in his divorce and it pushes him to taking a cut of Voight's extracurricular activities. There's a moment after Voight exits Stillwell's car that up that a hint of a smile flashes across his face. He now has the ammunition he needs. 

Aside from the case, Ruzek's fiancé makes the decision to end their engagement. She's certainly right, he's changed since the academy; he's a man that has started to find his footing and his confidence and he's shown to be incredibly loyal and supportive to the members of the team.

It's good, though, that one of them did decide to call it all off before they jumped into something that was harder to fix. 

Finally, a man named Charlie from Lindsay's past comes to pay her a visit. For what, no one knows yet, but Voight is not happy to hear he's back. 

Is Dawson going to make it?