|Played by:||Albert Hall|
|First episode:||"Day 3: 9:00pm-10:00pm"|
|Last episode:||"Day 3: 2:00am-3:00am"|
Before Day 3
Milliken and Palmer were close friends for many years. Milliken provided considerable financial support to David during his presidential campaign, and even offered his brother Wayne a position at Milliken Enterprises. Milliken was fairly prominent in Washington politics as well; he had a handful of loyal senators in his pocket whom he would use to manipulate policy when he wanted to.
Twelve years before Day 3, Milliken was driving drunk when he hit and killed Kevin Kelly's daughter in a hit-and-run crime. He paid off Kelly, who was an eyewitness to his daughter's death, to keep him from testifying against him.
Shortly after David Palmer made a press conference about the terrorist strike planned on American soil, he received a phone call from Alan Milliken, one of his longest supporters. Alan said that he would like to meet in person, and David agreed to go to Alan's house. Alan asked him not to bring his brother and Chief of Staff Wayne. When David arrived Alan had his wife Julia come in and tell David that she and Wayne had a affair three years ago. Alan pointed out that it was when he was recovering from a stroke. Alan asked Palmer to fire Wayne or he will pull his support, but Palmer refused.
Shortly thereafter, Milliken's friends in Congress began calling David one by one to withdraw their support for his health care reform bill, a piece of legislation that he had been working to instate for two years. Unwilling to back down to Milliken's extortion, David decided to call his ex-wife Sherry to resolve the situation.
Sherry quickly dug up dirt on Milliken, and Alan called David to tell him to pull Sherry off. David dismissed Milliken and had Sherry continue. Sherry visited Kevin Kelly, who agreed to come forward with the truth about his daughter's death in exchange for a presidential pardon for his imprisoned son. Before David could make a decision, however, Kelly disappeared. Hoping to corner Milliken and prove that he was involved in Kelly's disappearance, Sherry then went to the Milliken house and tried to convince Julia to help her. Julia refused at first, which forced Sherry to get Alan's cell phone herself. Sherry recovered the phone and looked up a previously dialed number. She then got in a fight with Julia, which woke up Alan.
Sherry verbally berated Alan, which gets him yelling. While yelling, Milliken suffered heart failure and Sherry convinced Julia to prevent Alan from getting to his medicine. Alan Milliken fell to the ground reaching for his medicine and died.
Julia later admitted to the police that she and Sherry prevented Alan from getting to his medication. Sherry was later questioned, but she lied, claiming she was with her ex-husband the entire evening.