Oscar Henderson

Oscar Henderson was an officer in the New York Police Department. He was asked by Commander Strebbins to keep an eye on Amy Pond and the Doctor as they chased after the Mammoth. He helped Amy to find the Doctor by using a Police tracker dog named Bismarck. He later mets up with Commander Strebbins, who was being controlled by the Vykoid, Lars. He was claiming to report on the Doctor, but was going to shoot her. Eventually, he gave himself up as a puppet to the Vykoids.

After the Doctor forced the Vykoid leader; General Erik to disable the Time Freeze, the New Yorkers minds were sped up to normal speed, causing them to forget the events that occured when the Forgotten Army attempted an invasion. Oscar forgot the Doctor and Amy, although he encountered them before they left in the Doctor's TARDIS. (NSA: The Forgotten Army)