We open to Captain Weaver plagued by nightmares and lack of sleep. As the resistance moves up the timetable of the attack to within 4 days, the lack of word from the other troops and the troubles in making bombs has General Porter concerned. Porter asks Tom to take a scout team into the city to gather intel on the aliens.
During this Hal goes to look for Ben and finds that he has been jumping rope for almost three hours without breaking a sweat. Ben tries to hide this fact from Hal, but he finds out and looks concerned.
Porter meets with Pope who is still recovering in sickbay. Pope tells Porter he can help them make real explosives and while they do not trust him, they give him the go ahead to help. During the conversation, Weaver notices a drawing of a series of buildings that Rick made. Weaver asks Rick how he came to draw them. Rick does not answer but gives the drawing to Weaver.
The next day Pope enters Scott’s lab to assist with the explosives. Pope finds an alien mech that has been disassembled. The mech gun is accidently fired scaring Matt. Pope and Scott notice the giant hole in the wall it makes.
As the team prepares to go on their scouting mission, Tom asks them if they thought Weaver has been acting strange. Weaver enters and asks Tom if he is questioning his right to command to which Tom says no. Weaver tells Tom he will be going on the scouting mission.
Dr. Glass brings Ben in to check on him. Ben’s spikes from the harness are still there and he comments how he and Rick still have them while the other children’s spikes have faded. Dr. Glass notices a hardening of the skin around the spikes that Ben cannot feel when poked with a scalpel.
The scout team reaches their lookout point and views the large structure the aliens are building. The group takes notice that the construction is every human-like and can be taken down by human means. We get to see for the first time a new alien. This alien seems to be the commanders of the skitters, they are talk and slender and look humanoid-like.
On their way back with pictures and intel the team runs into a survivor named, Sonja that after a short while warms up to them and invites them for tea. Weaver stays behind as a lookout as Tom and Hal go to the woman’s house.
Back at the school, Matt goes to talk to Pope against his father’s wishes. Pope tells Matt that the mech’s could have been made by humans as far as their construction and they should not be feared. Pope shows Matt a mech bullet that was man made, scavenged from military bases, but with a mech metal slug that is stronger than a normal bullet.
Meanwhile, Ben talks with Ricky who more and more has lost touch with his humanity. Ricky still believes the skitters love him and will be back for them. Ben tells Rick he hates the skitters and would kill them all of he had the chance.
Tom and Hal talk with Sonja who says she was taken by the aliens to a camp, but then released. She said she talked with the harnessed children, and that the aliens do not want humans on earth. Tom and Hal hear a noise and run outside to see Weaver has left and removed their sparkplugs so they could not quickly follow. As Tom and Hal leave, Sonja asks if they will be back.
Back at base camp, Dr. Glass asks Lourdes to keep a secret and enlists her help to examining the corpse of a skitter. Lourdes notices the anatomy is much like a human. Dr. Glass finds something she feared she would. Inside the skitter is the same harness found on the harnessed kids. Dr. Glass believes the skitters may have originally been something else.
Tom tracks Weave to his home and finds him outback. Weave is distraught and drinking and tells Tom how his wife and kids were taken. Weaver says his youngest child was harnessed and he discovered her in a camp and when he tried to remove the harness, it killed her. Weave does not want to fight anymore, but when a mech attacks and Weaver finds a pair of his wife’s glasses that were not there before he decides to continue the fight.
Tom, Weave and Hal return to Sonja as they figure out the mech was heading straight for them and that Sonja sold them out. A harnessed Karen comes to Sonja’s door asking about Tom and the others. Hal wants to rescue Karen, but they hold him back not knowing who else is out there. Karen leaves food for Sonja in exchange for information and we see one of the new commander aliens are with her. As Tom and the group leaves, they feed Sonja false information knowing she would not want to go with them, but would still give the aliens information on them.
With the group back at the school, Tom says he will leave out Weaver’s breakdown in his report. Lourdes wants Dr. Glass to tell everyone about her findings, but because many people are scared and hateful of the freed harnessed children she does not want to do it, but agrees to tell Tom about it. Before the two can talk, Pope has a demonstration outside.
Pope tells everyone he can make mech busting bullets from melted down mech’s and shows how powerful they are. Seeing this Rick looks frightened and Ben sees him running away.
I really liked the movement in this episode. The fact that the aliens use human technology is interesting and provides the ongoing mystery. Now we have the added mystery that all skitters were harnessed beings of some sort. This could explain why the alien’s care for them as the harnessed will become skitters. Now we get to see the resistance take to the offensive, should be interesting as we are close to the end of this season.