Plot

When Grace's spying is revealed, mistrust is in the air. Major Shaw shows up to take control of the situation just as a geo-engineering project cuts off communications to the outside world.

Everyone is acting suspicious after Grace (Tembi Locke) was outed as a spy.

At GD, Fargo (Neil Grayston) walks Holly (Felicia Day) through becoming undead officially. She tries to decide what she wants to do. Zane (Niall Matter) offers her his lab.

Jo (Erica Cerra) is trying to avoid letting word of Grace's arrest become known higher up the chain. But then Major William Shaw (Roger Cross) shows up. He informs them the Justice Department will be taking over and they're taking custody of Grace. Jo is busted for not telling him immediately. Shaw resolves to find anyone else involved.

In his garage, Henry (Joe Morton) fires up the old data drive found in the cabin safe. It's a report from him, saying they should focus on a project in section 5 and he's made contact with Senator Wen.

Carter (Colin Ferguson), Allison (Salli Richardson-Whitfield) and Jo head to an experiment on "smart dust" to work against global warming. It's like a gazillion tiny versions of a car shade to protect the ozone. They have smart fog in the air being contained by a plasma field. They can control everything about it, including the reflectivity so the particles look like a mirror. They're going to spray them. Cut to Fargo overhead in a biplane.

Zane shows Holly around his lab then steps out. The computer suggests research opportunities. She has one message in her inbox. The computer plays it. It's a series of images and flashing lights. Holly is momentarily mesmerized.

Zane comes back having seen a surge on his PDA. Holly is creepy and zoned out. She tells him she didn't see anything.

Out in the test field, Fargo prepares to swoop over in the biplane. Carter wonders whether something is going to blow up or if he'll get covered in goo, the two likeliest scenarios.

Fargo releases the dust trail. They're contained by the particle field. Allie checks reflectivity and sees everything is working perfectly.

In the lab, Holly shows the hypno-email to Andy (Kavan Smith), who is also mesmerized.

Carter and Allie return to the station to find Henry waiting for them. He tells them he's there to surrender himself to local law enforcement and GD security. He tells them he's the second spy. He coordinated everything and recruited Senator Wen. He takes full responsibility.

Carter is concerned until Henry tells them it was the other Henry from before they went back to 1947. Carter thinks that lets him off the hook. Henry says if they punish Grace, they have to punish him.

Carter suggests he talk to Grace before doing anything else.

Back at GD, Holly gets Fargo to sign for a bunch of supplies for the bioprinting lab -- not her area of expertise. She wants to work on the technology that saved her.

Shaw calls Jo to give the OK for Henry to talk to Grace. On the road back to GD, her phone fuzzes out. They notice a car coming straight toward them. Both cars swerve and then come to a stop inches apart. Carter and Jo end up facing exact mirror images of each other. The smart dust doesn't seem so smart anymore.

Carter and Fargo go back to the smart dust control unit and find it ripped out. Fargo explains the dust could eventually affect all systems, from independent thought to bladder control.

Grace tries to convince Henry not to turn himself in. She was already having doubts about Beverly and her group before he came back. "You made me a better person, so if you're looking to take responsibility for something, take responsibility for that," Grace says.

At the experiment field, Andy reports the disruption is getting worse. Fargo is trying to make a new control panel, but the last one took years to make. Andy suggests it was sabotage. He has a list of 272 suspects he suggests Carter check out.

Back at the lab, Allie thinks they have about 12 hours until they start seeing effects of the dust. Fargo asks Allie to check out Holly. He's worried she's overdoing it.

Jo asks Zane to get her a list of the evidence Shaw is taking about Grace. But he says no. He doesn't want to get her hands dirty.

Allie goes to check on Holly and finds the bioprinter at work on a new body. It's 47% done.

Holly finds Allie checking out her research. Allie worries Holly is doing research more advanced than she should be doing. She shouldn't be fooling around with bio imprinting. Holly reminds her the boss, her boyfriend, said it was OK. She kicks Allie out.

Back at the experiment field, Fargo tries to get the smart dust to coalesce, but it doesn't work. The missing control unit uses the same wave lengths and is interfering. Carter remembers having the same problem once with a garage door opener. Andy shoots down the idea. He suggests more suspects for them to interview.

Alie finds Henry sitting gloomily at Carpe Diem. He mentions Holly asked him to come by to help with her research. Allie wonders how he would go about Holly's research. He suggests computer models, not bioprinting a body as Holly is doing. He thinks that sounds wacky.

Jo joins Shaw and sees him packing up the evidence. He's trying to get it out before the smart dust gets to it. She offers to help him go over it, but he tells her it's all classified.

Zane shows Allie fragments of the hypno-email he found on the computer. He slows it down and shows a ghost hand reaching out. He tells Allie about finding it on his lab computer on an email addressed to Holly. Zane doesn't believe she didn't see the surge he asked about.

The patterns of the hypno-email could act as a neuro trigger on her new photon brain. The patterns are too complex to be an accident.

Carter reports to Fargo the smart car system went down but nothing else so far. Fargo can't get his control panel fix to work. Carter mentions his garage door idea.

Fargo says it would work, contradicting Andy saying it would break various laws of physics.

Henry walks in a daze past Allie. He went to Holly's lab and says everything is fine. He tells Jo he had the bioprinter moved off site for "maintenance" so Holly won't have more access to it. He wanders off.

Carter tells Allie that Andy is acting weird and asks if the dust could be affecting him. Allie thinks there's something more than the dust making things wacky.

Jo goes back to Zane asking for his help. He's cool and confident and tells her without saying it he already removed all mentions of Henry from the evidence Shaw is packing up. Jo sees the hypno-email playing on his computer. She recognizes it from when Holly was trapped in the matrix. Carter calls asking her to come meet him.

Jo heads out to the forest looking for him. She runs into a patch of reflective smart dust, it's everywhere. It's like mirrors suspended in the air. She stops to look at herself in one and marvels at how creepy it is to be looking at herself.

Then mirror Jo grabs real Jo around the neck and whacks her. It's not a mirror. She yells for Carter but Andy comes out, mimicking Carter's voice. He's not there to help.

Fake Jo sits in Fargo's office as he makes excuses to Shaw for why the files were corrupted.

Zane shows Allie the email, which looks like someone trying to get out. Zane can't find a point of origin for the email. Allie looks at the readings and sees Z waves. Someone else could have been in the matrix.

Allie wonders if someone is controlling the smart dust so they can't communicate with each other. She tries to call Carter, but is interrupted by Shaw coming in to arrest Zane. Jo does it for him.

Carter follows the control panel tracker (Fargo's version of his garage door opener idea) to a warehouse and finds computers set up. But he can't get through to anyone to tell them what he found.

He looks around the warehouse and sees the bioprinter at work on another body. He watches as the face takes shape. It's him.

He finds Jo and Henry unconscious on stretchers. He's trying to wake them up when he hears Holly behind him.

Holly, Henry, Jo and Andy fakes are all staring him down. Holly zaps him unconscious. "Now we're even," she says.