Day 5 antagonists

This is a list of characters with articles or unnamed characters entries who were antagonists during Day 5.

First cell

 * Anton Beresch: head terrorist at the Ontario Airport
 * Chevensky: terrorist and connection between Beresch and Ivan Erwich at the Ontario Airport
 * Gunman #1: Beresch's lieutenant at the Ontario Airport
 * Ibrim: one of Beresch's terrorists at the Ontario Airport
 * Vlad: one of Beresch's terrorists
 * Ivan: one of Beresch's terrorists (not Ivan Erwich)
 * Ishmael: one of Beresch's terrorists
 * Achmed: one of Beresch's terrorists

Second cell

 * Ivan Erwich: sub-cell leader and secret plant among the airport hostages
 * Andrei: Erwich's right hand man; devised a makeshift way to disperse the gas from the canisters; later worked directly for Bierko
 * Komar: terrorist at the Sunrise Hills Shopping Mall
 * Polakov: terrorist at the Sunrise Hills Shopping Mall
 * Jacob Rossler: software programmer, was hired to help the terrorists activate the nerve gas canisters
 * Sergei Voronov: mutual associate of Rossler and Erwich who put them into contact, was most likely arrested.
 * (Rossler security guard #1: one of two security guards outside Rossler's penthouse, shot at Jack and Curtis)
 * (Rossler security guard #2: the main desk security guard at Rossler's apartment building)

Primary cell

 * Vladimir Bierko: leader and financier of the Dawn Brigade, planned the later nerve gas attacks
 * Viktor Grigorin: terrorist, tried to gas a hospital to distract CTU
 * Ostroff: Bierko's sub-commander; infiltrated CTU and released a canister of nerve gas there
 * Mikhail: Bierko's right hand man after Ostroff's death.
 * Crewcut separatist: originally worked with Erwich but joined the primary cell afterward
 * Bierko's henchman: technician and final lieutenant
 * Bierko's terrorist: one of Bierko's last subordinates

Bierko's external supporters

 * Collette Stenger: information broker who sold schematics of the Wilshire Gas Company to Bierko and framed Audrey Raines; incarcerated
 * Joseph Malina: arms dealer with connections to Henderson; sold information to help Bierko board the Natalia
 * Anatoly Markov: Russian consul; introduced during Day 6 when Logan revealed that he was a co-conspirator in the events leading up to Day 5; he was the operative inside the Russian government who helped supply the nerve gas to the separatists

Omicron International conspirators

 * Christopher Henderson: ex-mentor of Jack and former CTU director, orchestrated the murders of David Palmer, Tony Almeida, and Michelle Dessler at the behest of Graem; senior Executive of Omicron International; killed by Jack Bauer
 * Brennan: head of the unit that infiltrated the Presidential Estate on Christopher Henderson's order to assassinate Wayne Palmer; killed by Jack Bauer
 * Cobb: one of the men in Brennan's squad; was knocked out by Wayne Palmer
 * Cooper: leader of Henderson's mercenary squad to assassinate Jack Bauer, Wayne Palmer, and Carl Mossman at the City Trust and Savings; Bauer tripped an alarm making LAPD arrive and engage Cooper and his men; Mossman and Cooper were killed in the ensuing gunfire with the LAPD and military as Bauer and Palmer eluded the scene
 * Stipes: leader of the mercenaries who flew alongside James Heller's car in a helicopter with orders to kill him if Henderson did not periodically contact them; killed by Curtis Manning
 * Scott Evans: lead pilot for Omicron International; Henderson handed off the recording to him; incarcerated.

Executive Branch conspirators

 * President Charles Logan: high level sponsor of the conspiracy; was exposed when Jack Bauer found a recording of a conversation between him and Henderson; after Miles Papazian destroyed this recording, Bauer, Chloe O'Brian, Mike Novick, Aaron Pierce, and Martha Logan worked together to expose him; arrested for murder and treason
 * Walt Cummings: Logan's Chief of Staff; involved in the early hours of the conspiracy with Nathanson; killed but framed as a suicide under orders from Graem and his associates, who planned to have him be the scapegoat
 * Hank: shooter hired by Cummings to eliminate Jack Bauer; failed, and killed by Jack
 * Schaeffer: Cummings' inside man with the terrorists; killed by Ivan Erwich
 * James Nathanson: Charles Logan's middleman and contact for Cummings; with the help of Anatoly Markov, he established communication with the separatists and supported Anton Beresch; after being discovered, Nathanson cut a deal to gave Bauer a chip that lead to Omicron and Henderson; killed by Ostroff's separatists
 * Conrad Haas: sniper hired by James Nathanson who killed David Palmer, bombed Michelle Dessler and Tony Almeida's car, and tried to kill Chloe O'Brian; killed by Jack Bauer
 * Kohler: one of the three men working beneath Haas; pursued Chloe O'Brian; was stabbed by Jack Bauer.
 * Spotter: field operative of Nathanson who found Haas and his three men dead
 * Alpha 7: associate and co-conspirator of Nathanson; killed by one of Bierko's men
 * Nathanson's man: subordinate of Nathanson; killed by Ostroff
 * Justin Adams: corrupt Secret Service agent; restrained Martha Logan; later was sent to murder Aaron Pierce, but was shot first by Martha Logan

BXJ Technologies conspirators

 * Graem Bauer: the leader of the four BXJ Technologies co-conspirators; directed President Logan through the cover-up in the last hours of the day; ordered Henderson to kill David Palmer (after Logan's arrest, he was not implicated in the conspiracy and he remained at large; killed during Day 6 by his father Phillip)
 * Ron: one of Graem's three co-conspirators at BXJ
 * Robert Joseph: one of Graem's three co-conspirators at BXJ

Chinese operatives

 * Cheng Zhi: kidnapped Jack Bauer in recompense for Jack's invasion of a Chinese consulate during Day 4 and to extract American secrets from him
 * Chinese agent: one of Cheng's men; deceived Jack Bauer to assist in his kidnapping

Miscellaneous

 * Spenser Wolff: mole at CTU working for Walt Cummings; believed he was merely planted to ensure that CTU was operating properly; is currently incarcerated in CTU Los Angeles
 * Cal: technician forced to help Erwich weaponize the canisters; killed by Erwich after accomplishing his task
 * Jenny McGill, Dwayne Thompkins: planned to sell Lynn McGill's keycard to Ostroff for money, but Ostroff murdered them instead
 * Miles Papazian: Homeland Security staffer; allegedly sexually harassed Shari Rothenberg; destroyed an important and incriminating audio recording of President Logan to gain favor and was rewarded with the promise of a position at the White House