Dmitri Gredenko

General Dmitri Gredenko was a former Soviet general who masterminded a plot with terrorist Abu Fayed to use suitcase nukes against American targets. Hamri Al-Assad first provided his name to CTU, who soon determined that one of Gredenko's recent business contacts was none other than Jack Bauer's estranged father, Phillip.

Day 6
When Abu Fayed began to make mistakes, Gredenko arrived in Los Angeles and spoke to Fayed on the phone. Gredenko expressed his disappointment in Fayed's lackluster performance, and was hoping for an improvement.

It soon became apparent that Gredenko had a huge hatred for the US. He also felt that the Russia made a huge mistake by being afraid to use nuclear weapons against the Americans during the Cold War. He planned on getting revenge by using Fayed's suitcase nukes to strike against three different US targets, and let Fayed's terrorist cell be the scapegoat for it. When Phillip Bauer learned that Gredenko was in Los Angeles, he ordered his assisstant Liddy to have Gredenko found and killed, before CTU learns about BXJ Technologies involvement in the selling of the nukes.