Alicia M. Corwin was the deputy Assistant to the President for National Security Affairs (APNSA) and one of the few to know of the Machine's existence.
Later, she introduced Ingram to Denton Weeks who told Ingram that the DIA agent was found to be a traitor. Weeks was curious as to how the Machine actually worked, and was unhappy when he was told that the Machine couldn't be used to track specific people. He threatened to reduce the payment for the Machine, but Corwin explained to him that Ingram was building it merely for one US dollar. ("Super")
Alicia met with Nathan in a bar to discuss the transfer of the Machine to its new location. They discussed dissemination and she assured him that nobody would be able to track intel back to the Machine or to Ingram. Yet she was visibly shaken and told Nathan that she was happy to return to her day job once everything related to the Machine was settled. ("No Good Deed")
Corwin was in Morocco, where she met with CIA agents Mark Snow, John Reese and Kara Stanton. She gave Reese and Stanton orders to retrieve a stolen laptop with secret software from Ordos, China. In reality, whether she knew it or not, the whole operation was nothing more than a smoke screen to check and make sure that an advance team had eliminated all the software engineers related to The Machine as well as successfully moving the Machine to another location. ("Matsya Nyaya")
Will Ingram, eager to know what his father was working on before he died, tracked Alicia down and questioned her. During their conversation, Will referred to his "uncle Harold". Alicia seemed unnerved at the mention of his name and abruptly ended the conversation. She told Will nothing about her knowledge of the Machine. ("Wolf and Cub")
Sometime after meeting with Will, Alicia was being contacted by a member of NSA, Henry Peck who was being attacked by government assassins trying to silence him about The Machine. Peck called Alicia numerous times trying to get information about "the machine" he was suspecting, Though they never met in person, Alicia spoke to Peck over the phone. Not answering any of his questions she only mentioned "Sibilance" and told him to "run". Apparently through following Peck, Alicia managed to listen in a conversation between Peck and Finch. She was visibly surprised when Finch told Peck that the machine existed and that he had built it. ("No Good Deed")
Alicia succeeded in tracking down Harold and observed him leaving the Library. She broke into the building and discovered Finch's headquarters. Not realizing what exactly she was looking at, she seemed overwhelmed when seeing the Irrevelant list. ("Firewall")
Alicia finally found Finch in his car waiting to pick-up John Reese and Caroline Turing. Climbing into his car and confronting him at gun point, she stated that Nathan was afraid and stressed about what they had built, and that he was killed by the machine. As guilt was starting to weigh down on her, she claimed she could feel it watching and listening to them at that moment. Alicia told Finch that she was tired of running.
Finch told her that she wasn't running from the machine, but she was running from people they had both trusted. Alicia said he was right, but that it was a good thing she found Finch first. Moments later, she was killed with a gunshot to the head by Root. She was later found dead at the meeting point by Reese. ("Firewall")
Corwin's murder attracted much attention from different angles. Reese asked Carter and Fusco to look into the case and find out why Corwin was in New York. ("The Contingency") Mark Snow also began an independent investigation under the coercion of Kara Stanton. ("Masquerade") They all hit a dead end because at the same time Special Counsel and Denton Weeks conspired to corrupt the investigation when they feared that the investigation into Corwin's death might uncover their secret activities. ("Bad Code") Their operative, Hersh, managed to clean up the majority of the evidence, except for a few objects Fusco removed from her apartment prior to his arrival. Hersh also removed an RFID chip from the right shoulder of Corwin's body that had been planted in her and could be a reason for Corwin's paranoia and why she had been running and hiding. ("Masquerade") Special Counsel later used the chip to tie the virus that Stanton uploaded to Decima Technologies. ("Zero Day")
- "Prisoner's Dilemma" (archive footage from "Matsya Nyaya")