The X-Files: 6x17
Trevor
After a tornado rips through a prison camp, one of the inmates disappears from solitary confinement and the prison warden is killed. As Mulder and Scully track him, he appears to have the power to pass through solid matter while changing its composition.
6 - 1The Beginning Nov. 08, 1998
6 - 2Drive Nov. 15, 1998
6 - 3Triangle Nov. 22, 1998
6 - 4Dreamland (1) Nov. 29, 1998
6 - 5Dreamland II (2) Dec. 06, 1998
6 - 6How the Ghosts Stole Christmas Dec. 13, 1998
6 - 7Terms of Endearment Jan. 03, 1999
6 - 8The Rain King Jan. 10, 1999
6 - 9S.R. 819 Jan. 17, 1999
6 - 10Tithonus Jan. 24, 1999
6 - 11Two Fathers (1) Feb. 07, 1999
6 - 12One Son (2) Feb. 14, 1999
6 - 13Agua Mala Feb. 21, 1999
6 - 14Monday Feb. 28, 1999
6 - 15Arcadia Mar. 07, 1999
6 - 16Alpha Mar. 28, 1999
6 - 17Trevor Apr. 11, 1999
6 - 18Milagro Apr. 18, 1999
6 - 19The Unnatural Apr. 25, 1999
6 - 20Three of a Kind May. 02, 1999
6 - 21Field Trip May. 09, 1999
6 - 22Biogenesis (1) May. 16, 1999