Complete story — includes the ending
A 4400, Curtis Peck promises to expose ten agents from the future ( the Marked, noted for their X-shaped mark behind the left ear) who have taken over the bodies of prominent people in the present day. Each of the Marked are allied to the faction in the future that are opposed to the 4400, and are trapped in the past in an attempt to complete their mission: the destruction of Jordan Collier and negation of the 4400's effect on the timeline. Before being compromised, Curtis Peck is only able to name one of the ten, the CEO of Ubient Software. Tom is taken and seemingly operated on, resulting in a mark behind his left ear. The only revealed Marked meets with Tom and Diana, seemingly to feel out an alliance.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, List of The 4400 episodes. HTML formatting and reference markers removed. · Content license