in "One Son". Three years later, it is revealed in "William" that Spender survived the gunshot, but that he was subjected to horribly disfiguring experiments at the hands of his father. Posing as Mulder, he infiltrates Scully's house and injects William with a magnetite substance to seemingly "cure" the baby of his telekinetic powers. The motivation or repercussions of his actions are never fully explained. He testifies for the defense during Mulder's murder trial in "The Truth" where he reveals that Teena Mulder had an affair with CSM, and that he and Fox Mulder are half-brothers. A DNA test conducted on a disfigured Spender in the episode "William" initially leads agents Scully, Doggett, and Reyes to believe he is Fox Mulder, thus lending further credence to Spender's claim that both he and Mulder are the children of the Cigarette-Smoking Man. The Lone Gunmen John Fitzgerald Byers John Fitzgerald Byers is portrayed by Bruce Harwood. Byers was born in Sterling, Virginia on November 22, 1963, the day on which John F. Kennedy was assassinated, and was named after the fallen president—his parents were originally planning to name him Bertram, after his father. Byers idolized his namesake, but always had suspicions about the real cause of his death. Byers worked as a public affairs officer for the Federal Communications Commission (FCC) in Baltimore until May 1989. At that time he met Susanne Modeski at a consumer electronics show in Baltimore and instantly fell in love with her. Initially lying about her identity to him, she revealed herself to be a scientist working for the Army Advanced Weapons facility and appealed to him for help in stopping one of her developments—a gas causing fear and paranoia—from being used by the military on innocent civilians. Enlisting the help of Melvin Frohike and Richard Langly, who were also at the electronics show, they succeeded in helping Modeski, although she was later kidnapped. Modeski had awakened a desire in all three of them to uncover the truth, which subsequently led to the formation and publication of a newsletter entitled The Lone Gunmen, providing information on government cover-ups and conspiracy theories. Byers appears to have some working knowledge of medicine, genetics, and chemistry; he is able to interpret DNA strands, instantly informing Mulder that Scully's blood had been tampered with in "One Breath". All three of the Lone Gunmen die in the episode "Jump the Shark," sacrificing