After Larry's insane murder, Vaughn runs out of patience and 'good will', so he orders Michael to hand over the list. They agree to meet in an abandoned hotel. Mchael however prepares a last stand with the whole team. Fiona's explosives expertise and Michael's heroic fight after Jesse is soon crippled by a leg-wound are no long-term match for Vaughn's small army. Sam fails to mobilize the Miami PD, so he recruits Ma Weston to help blackmail congressman Crowley, who proves problematically mistrusting. The winner is put trough an excruciating 'debriefing' before being introduced to Michael's old boss, Raines.
Michael, Fi and Jesse are trapped in an abandoned hotel, held under siege by Vaughn's team of killers. Meanwhile, Sam and Madeline are forced to turn to congressman Cowley as their only hope to save them.
- Season Finale:
Sam informs Michael that the FBI is tracking his every move and are following every 'phone call he makes. Michael wants to get the list on the thumb drive to someone in the government who has some serious clout. Sam asks Maddy to strong arm her old buddy on the House Intelligence Committee, Representative Bill Cowley. She's already upset that she has been relocated to a motel and placed in a non-smoking room.
Vaughn (Robert Wisdom) calls Michael and says they should meet, telling him he was given a chance to be his friend, "now you're going to see what its like having me for an enemy -- and so are your friends, and so is your family."
Michael considers that the most secure place to hide the list is inside a heavily-guarded nuclear power plant.
Sam takes Maddy to a Cowley event. She tells him to get to the docks around the back of the place. Maddy sneaks her way into the event.
Michael and Fiona work up a plan to create an explosion on a water line to disrupt the flow of traffic to the nuclear plant in order to hide the list. Fiona wonders what Michael's end game is and what he prefers outcome to be.
Their conversation is interrupted when Jesse tells them Vaughn's men are in the area. A chase ensues and when Michael's Dodge Charger is shot up beyond its use, he attaches one of Fi's explosive C4 charges to it and jumps into her car.
The explosion and resulting crash blocks Vaughn's guys, but only momentarily as more appear to join the hot pursuit. Fi, Michael and Jesse crash and Jesse's leg is impaled by a metal rod. He pulls it out and they leave the scene of the crash and go into an empty, abandoned in mid-construction hotel. It's suddenly three against an unknown quantity of adversaries and Michael reminds us that sieges don't make good stories because the smaller group won, it's usually because they put up a good fight before being killed.
A firefight ensues and Fi gets upset with Michael because he said earlier that this was his fight and not hers. Still, she's caught in the middle of it, and so is Jesse. Michael improvises a splint for Jesse and they make their way to another part of the hotel. Vaughn is outside and calls Michael, who tells him that if he wants the list he has to come in and get it.
Fiona and Jesse find some catering equipment (Sterno cans) to use as improvised explosives and whips up a dish of destruction. Jesse asks Fi whats going on with her and Michael, and she says she thought all the spy business would pass, but it is his life. Jesse tells her you don't "get involved with someone like Michael Westen hoping he's going to buy a house on the lake and settle down." Vaughn and his men walk in.
Maddy gets a moment with Cowley (John Doman) at his speaking event and pulls him aside. She convinces him to go outside with her to rendezvous with Sam who talks to Cowley about a covert network operating within in the government. Cowley thinks it's ridiculous and mocks the idea of the list, but Sam tells him that Barrett's murder in Miami (in the previous episode) was all about the list.
At the hotel, Fi creates a big blast to throw off some of Vaughn's men. Michael is on the roof and takes out one of Vaughn's guys after an intense hand-to-hand fight. He takes the man's tactical vest and forces him to zip-tie his own hands. Michael realizes he's dodging a sniper, and winds up rappelling down the side of the building, using the man he left on the roof as his counterbalance. Adroitly, Michael lands inside the hotel on a lower floor.
Jesse and Fi see a long line of police cars on their way to the hotel when a black fleet car blocks their entrance to the property and one of Vaughn's men diverts all the law enforcement away.
Vaughn calls and tells him one of the guys on the list works for Homeland Security and told all the cops they were doing a training exercise at the hotel. Michael tries to devise a new plan to escape from the hotel while Vaughn waits outside. Michael says he hopes Sam is doing his job.
Sam is talking to Cowley, trying to convince him to take a chance on the list being legit. Cowley makes a call, then tells Sam this is "delicate," and he needs to take his time.
Just then, Cowley receives a call and tells Sam there's a threat against his life and the police are on their way to take him into protective custody. Sam tells him the cops might be taking him away because Sam let him in on the secret about the list. Cowley is now convinced and goes with Sam.
At the hotel, Michael and Fi make a bomb out of fertilizer they conveniently discovered in a gardening supplies storage area, and realize that they only have one chance to make it work right. They plan to set off the explosion and escape down the inoperative elevator shaft. First, they have to lure Vaughn and his men to the top of the hotel. Fi calls Vaughn and in a hushed voice offers to make a deal: the list for their lives. She tells him to come to the top of the hotel, but says she wants Michael unhurt.
Sam and Cowley are trying to sneak around the local cops and Sam tells Cowley to talk to his buddies in the military.
Vaughn calls Fi again and tells her that he and his men are headed up to the top of the hotel, but that he brought along a bit of leverage: Michael's mom. This puts a large kink in their plan to blow up the stairwell as Vaughn's forces are arriving.
Michael asks to talk to Maddy. Vaughn hands her the walkie-talkie and she tells Michael they shot her and yells at him to run. Vaughn tells Michael she's fine, but Michael says he'll come down to talk. Vaughn says he'll believe it when he sees it.
Michael makes a new plan to get over to an outbuilding and draw Vaughn's men's fire to give Fi and Jesse a chance to get out of the hotel with the list. Fi says its a suicide mission, but he says he has no choice. Michael gives Jesse the list and tells him he's truly sorry for what he did in getting him burned.
Michael makes a run for it across and open space and crashed into a small outbuilding, dodging bullets the entire way. When Jesse and Fi see Michael made it to the building, they start to run. But before they get out, Fiona decides to go back with Michael. When she dives into the small building, Michael shouts, "What the hell are you doing here?"
They have another argument while trying to shoot back at Vaughn's guys. They run out of ammunition and just when they're ready to blow themselves up, a military force rushes in with explosive breaching charges and Vaughn's men are ordered to stand down and surrender.
Vaughn is arrested and tells Michael they "could have been a good team." Michael says he already has a team. He thanks his mom for hanging in there.
Jesse covertly passes Michael the thumb drive containing the list with a subtle handshake just before a guy in a suit walks up and tells him he needs to talk to him. Michael gives Fi a kiss and leaves with the stranger.
Michael is in the back of a car and asks the guys he's with where they're going. The man says he isn't authorized to answer questions. Michael asks for water and the man says no.
When they get to their destination, the guy hands Michael an overcoat. He gets out of the car, and there's snow on the ground.
Another man (Dylan Baker) well-dressed in a suit walks out of the building and up to Michael, saying, "Welcome back." He shakes his hand and welcomes Michael into the building.
The camera pans out and we see that they're in Washington, D.C.