Oliver and Felicity find themselves on opposite sides of the Chase manhunt

Arrowsback, guys!

And people are crossing lines tonight.

So many lines are crossed, you have no idea.

Dangerous Liaisons

Credit: Diyah Pera/The CW

These lines are beautiful, just the best lines, and they get crossed left and right.

So Chase is a code monkey, too?

Anyway, Chase escapes, leaving behind a shattered Maximum Force screen.

(It was vintage, Curtis laments.)

At Helix, Kojo Sledgehammer (whose name, apparently, is Alena how did I miss that?)

suggests that the group could help find Chase if Felicity could get them access to A.R.G.U.S.

internet, which she does.

Ah, but it was a setup!

Unbeknownst to Felicity, Helix hacked A.R.G.U.S.

elevator, hoping to steal a super fancy key card.

He founded Helix, and A.R.G.U.S.

has been holding him without charges.

Long story short, it looks like Felicitys going on a retrieval mission.

agent that Lylas asked Team Arrow to escort to safety for avoid this very thing.

Rejecting Felicitys offer to negotiate with A.R.G.U.S.

for Caydens release, the Helix mercs attack the agent and her Team Arrow escort.

A fight ensues until Felicity contacts John and asks them to let the mercs escape with the security key.

The no-questions-asked nature of this scene is a powerful reminder of just how much these three trust each other.

And now the secrets bubble to the surface.

Lyla chides Felicity for not considering the collateral damage.

When Felicity looks to Oliver and John for support, Oliver tells her she might be crossing a line.

She… doesnt take this very well.

Youre the last person on Earth who gets to give that lecture, Oliver.

Or second to last, she amends, looking pointedly at Lyla.

When Felicity says shes sticking with the Helix plan, John questions whether theyre on the same side anymore.

Oh, did you think we were done with secrets?

It turns out, A.R.G.U.S.

has been holding Cayden, a person of interest, without a trial in an illegal black site.

Lyla isnt willing to release him, so instead, A.R.G.U.S.

and Arrow set a trap to catch Helix during their rescue attempt.

Im not sure how much credibility I have with her, Oliver admits.

Cut to Felicity leaving her loft in all black and her infiltrating a secret government facility smoky eye makeup.

Oliver arrives to ask her not to go.

Oliver promises theyll find a better way.

This is me asking you, dont do this.

How can I be any different?

You dont have to carry that burden any longer.

Let me do it.

When he doesnt agree, she tells him hell have to stop her.

So thats what he sets out to do, with A.R.G.U.S.

Also, things are tense between John and Lyla, and I DO NOT LIKE IT.

I dont want that to happen to my wife, he says.

Lyla walks away without a word.

Helix is armed with guns and magic tablets that will shut down A.R.G.U.S.

And then, twist!

It turns out the A.R.G.U.S.

Lylas surprised they know this, but hello.

Its Helix.Of coursethey know where hes being held.

Before they can free him, Team Arrow arrives, and they all commence to fightin.

Dinah drops one merc, telling him, Dont grab a woman unless you have permission, dumbass.

This is good advice, and Dinah continues to be both awesome and underused.

He bellows at her to get out of the way, but she regretfully activates the razor fence.

You know, literally putting an uncrossable barrier between them isnt subtle, but dang, its effective.

She pleads with Oliver to understand why she went to these lengths.

Dont count on it, Oliver replies.

In the end, the Helix mercs used rubber bullets, so there were no A.R.G.U.S.

The House of Diggle is a tense place that night.

But its not better, John replies.

Lylas unapologetic, saying shell keep doing what she has to do.

John, clearly exhausted, tells her he doesnt want to revisit this particular fight.

Lyla suggests they just move forward, but John says he doesnt know if he can.

This seems… well, it seems bad, guys.

Felicitys in an unsettled place, too, having arrived at Helix HQ to find it abandoned.

is after Cayden, Felicitys a liability.

This sends Felicity back to the Arrow Cave, where she plugs in the biometric tracker.

Olivers there, presumably still drinking and brooding.

When she tells him Helix froze her out, hes sincere when he says hes sorry.

But Felicity hasnt forgiven him for not backing her play.

Well, howsthatfor a character-driven episode that benefits from years of relationship-building between these characters?

Sounds like we need to buckle up for next weeks episode …