|Defense override module|
|Created by:||Adrian Cross, Derrick Yates|
|Used by:||Margot Al-Harazi, Cheng Zhi|
|First episode:||Day 9: 11:00am-12:00pm|
|Last episode:||Day 9: 8:00pm-9:00pm|
The Defense override module was a military device that could hack any nation's military drones and weapons systems.
Before Day 9, Margot Al-Harazi contacted Derrick Yates, a British terrorist hacker and a former member of Open Cell to develop the device, with the intension of hacking the United States Air Force MQ-1 Predator drone which was flying above Kajaki Province, Afghanistan.
Yates completed his task and by midday he fired a AGM-114 Hellfire missile at a U.S. military convoy's armored vehicle. Major Shepherd, two American and two British soldiers were killed as a result of the attack. ("11:00am-12:00pm")
As a result of Yates' hack, Margot had control of ten different US drones, and redirected them all above London, United Kingdom. Margot's daughter Simone then killed Yates and returned the device - after a chase through Waterloo Station with Jack Bauer. ("1:00pm-2:00pm")
Margot discovered that the U.S. was attempting to ground it's drone fleet, and ordered Naveed to transmit the override signal ahead of schedule. Despite the setback, the device successfully assumed control of six RQ-29Vanguard stealth drones. Margot demanded that President James Heller give himself over to her within three hours, or she would begin launching attacks using the drones. ("3:00pm-4:00pm")
When Margot discovered that her daughter Simone was in St. Edwards Hospital, she used another drone strike to try to kill her, stopping her from disclosing information about Margot's whereabouts. She used another two drones to try to stop Jack and CIA agent Kate Morgan, who had saved Simone from Margot's attacks. ("4:00pm-5:00pm")
Heller decided to give himself up to Margot, and she agreed to fly the remaining drones into the English Channel. She did this, and used a drone to kill Heller who was stood in the center of Wembley Stadium. However when she discovered that Heller and Jack had betrayed her and Heller was still alive, she kept control of one drone. Jack managed to get to her before she and her son Ian could pilot the drone into Waterloo Station; Jack managed to redirect the missile into the Thames. ("7:00pm-8:00pm")
The module was returned under heavy guard to the CIA station in London. As it was being analysed by the CIA, Steve Navarro learnt that his position as a mole may be compromised. He contacted Adrian Cross, who offered to help him escape if he stole the module and delivered it to him. Steve did this, and despite being caught at Liverpool Street Station, Adrian managed to escape with the module.
Adrian and Chloe O'Brian returned to the Open Cell hideout to discover that all other members of their organisation had been killed. Cheng Zhi, a Chinese mercenary, confronted Adrian and Chloe and forced them to reconfigure the device so that he could use it on any target he pleased. Cheng shot Cross and tricked Chloe into fixing the device. He then used it to send an order to the USS Massachusetts, a United States Navy submarine, to sink a Chinese naval ship. ("Day 9: 8:00pm-9:00pm")