The White House team watches news reports of the bomb blast in Valencia, which is just outside of Los Angeles. Luckily, the wind is blowing the radiation away from populated areas. Karen learns that there are four more nuclear weapons. Although the Secret Service moves the President to the bunker, Wayne wants to give a televised speech to the public within the hour.
Milo gets word that all field agents in the area who were engaged with hostiles were killed in the blast.
Karen calls Buchanan from the bunker and is relieved to find out that the CTU office was not affected. Buchanan cannot confirm whether Fayed was killed in the blast or whether the other four nukes are still at large.
Chloe is overwhelmed when she finds out that Curtis is dead. She tells Morris that Jack quit because he was forced to kill Curtis.
Mass panic ensues on a street in Granada Hills. Fayed drives in a van, telling a man named Darren McCarthy on the phone that the bomb went off when the feds found his location. Both the engineer and the trigger were destroyed in the blast. Fayed offers McCarthy double the price to find him someone who can replicate the trigger device for the remaining four warheads.
Amid the fleeing people, Jack stands alone, silently looking at the mushroom cloud. A man approaches him for help because his helicopter crashed into a roof and there is someone stuck inside. The man had no idea that a nuclear bomb went off.
Jack runs to the crash site and climbs to the roof of the building. The helicopter teeters on the edge. Jack opens the chopper door and pulls the survivor out just before the craft topples to the ground and explodes into flames.
Jack phones Buchanan, who tells him that there are still four more bombs. Jack asks to be picked up even though he intended to quit. "Not after this," Jack says, looking at the mushroom cloud.
The White House compiles a list of countries that might be funding Fayed. They all claim to disavow the attacks. An Admiral advises the President to bomb all of these countries to send a message. Wayne says they will only retaliate against the enemy. Karen reports that CTU assesses that the bomb was meant for a more populated area. The scientist Numair was responsible for triggering it, and he was killed in the blast.
Fayed has the other four weapons with him.
Assad arrives at CTU. He pledges to Buchanan that he is not their enemy today.
Buchanan briefs Assad on the four other bombs still at large. Assad had no idea that Fayed possessed nuclear firepower. He had sent Fayed to meet with a Russian general a year ago about weaponry, but nothing transacted. Chloe starts looking up the name Dmitri Gredenko.
Morris compiles a list of Los Angeles people who conducted business with Gredenko. One of them is Phillip Bauer, the chairman of BXJ Technologies. This is Jack's father.
Buchanan calls Jack to tell him about his father's link to Gredenko. Although Jack hasn't spoken to his father in over nine years, he wants to question him alone.
At the Anacostia Facility, the FBI agents tell Sandra that they will need to wire Walid so that they can pick up more terrorist cel chatter from the inmates. Sandra is outraged because Walid isn't trained for this.
Walid approaches Salim in the prison yard and asks if he has heard anything more about the attacks. Salim says nothing. The FBI agents make a show of grabbing Walid. The other inmates watch and listen as Walid is interrogated about his terrorist activities. The agents quietly explain to Walid that they are wiring him. He follows along as they pretend to rough him up. They let him know that he is to say the FBI asked him about Fayed. The agents give him a bruise under his eye for effect.
Afterwards, Salim goes to Walid, but he doesn't want to talk. The agents confirm that they have a clear signal from the wire.
Jack phones his father's San Marino mansion and speaks to Sam, the servant. Phillip left mysteriously and didn't take his cell phone. Sam says he tried to find him through Jack's brother as well. "Where's Gray?" Jack asks.
Liddy, the head of security at the Bauer mansion, overhears Sam's conversation. Liddy phones Graem Bauer, Jack's brother, to tell him that Jack is in Los Angles looking for their father. Graem is the leader of the Bluetooth power broker conspirators who were controlling President Logan. "Damnit, we should have killed Jack when we had the chance instead of handing him over to the Chinese," Graem says. "We tried," Liddy responds.
Jack calls Graem, who acts completely surprised. Graem claims he and Phillip attempted to get him out of China. He also says he has no idea where their father is, and he promises to call back.
Jack calls Chloe to look up his brother's address because he doesn't want Graem to know he's coming.
Graem returns to his house and is greeted by teenage son Josh. His wife Marilyn is shocked that Jack is back in town. Graem accuses her of still having feelings for Jack.
The White House staffers argue over the wording in the President's speech. Lennox believes that this is the perfect opportunity to act more aggressively. Wayne wants the message to be more calming rather than coming off as a policy dictum.
As McCarthy works the phone looking for a bomb expert, he picks up his girlfriend Rita. She is eager to flee the city, but McCarthy says that they have a change of plans and are staying because a lot of money is on the table.
McCarthy calls Fayed to tell him he will have someone for him within the hour.
Nadia is convinced that Assad really does want peace. Buchanan thanks Assad for his intel and ships him off to Washington, per order of the President.
Milo gets word that the FBI has a wired man inside the Anacostia Detention Facility and they may have a lead on Fayed.
As Salim defends Walid as "one of them" to his fellow prisoners, Sandra argues with the FBI agent that Walid should not be participating in this. The agent says that Walid is doing the right thing and that the guards on the inside know to protect him.
Salim approaches Walid, who feigns reluctance to talk. Walid finally admits that the guard confiscated the phone number of Abu Fayed from him. Salim invites Walid to join the other inmates.
Jack shows up at Graem's mansion. Graem hugs him but Jack does not respond. They haven't seen each other since Teri's funeral. Jack demands to know where their father is, but Graem avoids the topic.
Jack slugs Graem and knocks him out. He ties Graem up in a chair. Jack grabs him by the throat and threatens to hurt him if he doesn't give up information. Graem says he is already hurting him. "Trust me, I'm not," Jack says intently.
Before he goes on live television, Wayne confesses to Lennox that he doesn't want to let the public see how scared he is. Lennox assures him that bravado would be no more appropriate than fear.
Despite Jack's demands for the truth, Graem swears that he has no idea where Phillip is. Jack is not swayed. He takes a plastic bag and begins to suffocate his brother.