The 4400: Graduation Day

Shawn suffers from the mental illness inflicted upon him by the Nova Group. Isabelle wants revenge. Matthew objects to her wanting to retaliate, so Isabelle kills him. After breaking Shawn out of the mental insitution, she finds Daniel Armand and forces him to cure Shawn, then inflict himself with a mental illness. Tom, knowing what she did, approaches her with the syringe from the future, telling her that the people from the future want him to kill her. She offers him the chance to do it, but he can't go through with it. Isabelle then decides, on her own, to pay a visit to Dennis Ryland. Meanwhile, Alana confronts the man who killed her husband and son.