fatal fall. Walker and Matuzak agree McComb is a criminal, but need solid evidence. Surviving an ambush by McComb’s henchmen, Walker is assigned a new partner, TEC rookie Sarah Fielding. They are sent back to 1994 to investigate McComb, and witness a disagreement with his business partner Jack Parker over manufacturing a new computer chip. They are interrupted by McComb from 2004, who advises his younger self that the chip will become highly profitable. The older McComb warns his younger self that they must not touch because the same matter cannot occupy the same space, then kills Parker. Fielding turns on Walker, revealing she works for McComb. After a shootout with McComb's henchmen, Fielding is wounded and Walker escapes back to 2004. Arriving in an altered future where McComb is a wealthy presidential frontrunner and has shut down the TEC, Walker appeals to Matuzak, who has no knowledge of the changes to history. They realize that the original time machine prototype was never dismantled and that McComb has access to it, allowing him to neutralize the TEC. Matuzak sends Walker back to the past to restore history, and is shot by agents of the now-corrupt TEC. Back in 1994, Walker finds Fielding in the hospital. She agrees to testify against McComb, but is murdered in her room. At the hospital, Walker finds a record of a recent visit by Melissa, discovering she was pregnant. Realizing she will be killed that night, he finds her and reveals himself to be from the future, and she agrees to make sure his younger self stays home. That night, the younger Walker is attacked just as before by McComb's men, but is unknowingly aided by his older self. McComb from 2004 takes Melissa hostage and confronts the older Walker with the bomb that will blow up the house, knowing he will die in the ensuing explosion but satisfied his younger self will become president with Walker gone. However, Walker reveals he has lured the younger McComb to the house; he pushes them together, and the two McCombs merge into a writhing, screaming mass before disappearing from existence. The older Walker escapes with Melissa as the bomb explodes, leaving her beside his unconscious younger self and returning to the future. Back in 2004, Walker finds the future changed once again: Matuzak and Fielding are alive with the TEC at full strength, while Senator McComb disappeared