Edgar gives Curtis information on Marwan. He works for McLennan-Forster -- the company who built the Override device.
Jack decides that he will go check out the McLennan-Forster headquarters, and he instructs Curtis to take Audrey and Paul back to CTU. Paul offers to go with Jack because his company sold the IT system to McLennan-Forster. He knows programming backdoors into the military files. Jack takes Paul, and sends Audrey with Curtis.
Driscoll says goodbye to her daughter's body.
Sarah learns about Maya's suicide and tells Heller. Driscoll refuses to relinquish her command even though Heller encourages her to go home.
The President calls and congratulates Heller and Driscoll. They are not sure whether Marwan has other plans besides the nuclear plant meltdowns.
Marwan sheds the CTU gear and escapes onto a city bus.
In the staff briefing, Edgar pulls up the McLennan-Forster employment file for Marwan. They theorize that Marwan entered America with the intent of performing a radical act against the country. He may have even used the company to recruit sleeper cells. Driscoll is distracted and walks out of the meeting. Edgar argues with Tony and Sarah about cutting Driscoll some slack. Sarah wants to report this to Heller, but Tony disagrees.
When Audrey arrives at CTU, she gets a call from Jack. He suggests that she get some rest, but Audrey wants to help her father. She asks Jack to take care of Paul.
As they drive, Paul tells Jack that he doesn't resent him but that he will fight for Audrey.
Tony and Heller discuss the theory that Marwan will launch another attack with his various cells. Suddenly, Driscoll faints. A medic takes her to get some food. When she leaves, Heller tells Tony that Driscoll will need to be relieved of her duty. Tony offers to fill in because he knows the job. Heller grants him the position of Interim Director of CTU Los Angeles, but he still wants District to send a permanent replacement.
Sarah and Curtis learn that Marwan had full security access at McLennan-Forster. The company also trains clients to use the weapons they manufacture. Curtis thinks McLennan-Forster will be reluctant to give out information because this leak will make them look bad.
McLennan-Forster CEO Gene McLennan is briefed by another executive, John Reiss, on the terrorist acts Marwan did under his employment there. McLennan is shocked. The only other person inside the company who knows about this is the head of security, Dave Conlon.
Conlon greets Jack and Paul as they arrive at the company headquarters. Jack demands to meet with McLennan, but Conlon resists. Jack becomes suspicious.
Reiss convinces McLennan that their company will be brought down if CTU finds out the facts about Marwan. McLennan is hesitant to go along with the plan to suppress information, but Reiss says that they might all face prison if the truth comes out. He promises that he and Conlon will take care of it.
Conlon takes Jack and Paul into McLennan's office, and the executives agree to take their servers offline so that CTU can check out Marwan's files.
Heller comforts Driscoll, and she agrees to go home. Audrey comes in to tell her father that she's back.
Curtis expresses dismay to Heller that Tony was named Director of CTU. Curtis felt he should have been given the job.
Reiss leads Jack and Paul to Marwan's office, as Conlon and McLennan watch them from a surveillance monitor. Paul notices that a lot of files were purged from the computer, and Jack suspects someone deleted them before they got there. Conlon can view Marwan's computer screen from his office and he clears the incriminating documents before Paul is able to find them on the system. McLennan is nervous. Conlon says that he may be forced to set off an EMP to bomb their own system, even if it cripples the company electronically.
Driscoll hands over her files and passcodes to Tony. She leaves CTU.
Tony addresses the staff and asks for updates from the investigation. He tells Edgar that Driscoll suggested he be relied upon.
Curtis asks Edgar to switch his focus to finding Marwan on satellite rather than searching for information at McLennan-Forster. Tony intercedes, ordering Edgar to stay on his initial task. Curtis defends his position, but Tony pulls rank. He assures Curtis that he only wants to catch Marwan and that he will be leaving by the end of the day.
Marwan waits in a dark alley as a car pulls up. A man named Yosik tells him that their people at the air force base are on schedule.
Paul uses backdoors built by the software designers to rebuild the deleted files from the empty directories. Conlon is stumped by this. McLennan frets that they will discover evidence proving that his company sold arms to terrorists. They are left with no choice but to use the pulse bomb. Reiss believes that CTU will suspect that Marwan was behind it. He calls a technician and orders the EMP activated. It will take ten minutes to charge up.
Sarah notices that their phone taps at McLennan-Forster are not working because of an increase in amplitude. Edgar tries to call Jack's cell, but the recording says he is out of range. All of the cell and land lines around the company are out, but the computers have not been affected yet.
Tony types a message to Jack over the system, but when Jack tries to call CTU he finds that his phones are all down. Paul opens a socket for Jack to respond to the message, and Tony tells him that frequencies are out all over the area. Paul recovers an encrypted file and he prints it out.
Conlon sees that Paul found something incriminating, but he can't make out what it is. He runs to Marwan's office.
Jack discovers that McLennan-Forster was developing an EMP as a non-lethal weapon for the military. It has just been set off, and anything with electrical components in the area will be fried. Jack sends word to Tony, who orders helicopters in the area to be landed because their electrical systems will be wiped out.
Tony tells Jack that the EMP originated inside McLennan-Forster in room 12. Jack runs out to find it, ordering Paul to meet him outside with the hard copy once it finishes printing. Conlon radios his guards to stop Jack. Conlon arrives in the office and tells Paul that he noticed he was printing something because they were searching the system as well. Paul sends him to the printer, which is empty. Paul runs with the printouts, and Conlon pulls out his gun and chases after him.
Paul hides in a dark office, and Conlon doesn't see him. Jack comes upon the room where the EMP is and knocks out the three guards keeping watch. Jack takes one of their passcards and enters the EMP room. He sees a heavy metal door begin to slowly close the safety chamber housing the EMP bomb. Jack uses all his strength to try to prevent it from shutting.
Paul hides out by a window, where only the moonlight from outside illuminates him. He notices the lights from the city skyline begin to black out.
Jack grabs a flashlight from one of the guards and tries to find his way out of the building. Meanwhile, Paul makes it to the front entrance but is stopped by an armed Conlon who demands the printout.
Edgar gets word that one of CTU's choppers just crashed. Tony goes to Heller with an update on the EMP bomb. They are interrupted by a call notifying them that Driscoll's replacement from District just arrived. Tony is shocked to see Michelle Dessler walk into CTU. Heller asks if Tony knows her. "I used to be married to her," Tony says.