Agents  Scully and  Doggett investigate a string of mysterious murders linked to a mystical being that is inhabiting its victims' bodies. As they gain more information about this inexplicable culprit, Scully and Doggett must race to stop it before it chooses its next victim in the "Badlaa" episode of THE X-FILES Sunday, Jan. 21 (9:00-10:00 PM ET/PT) on FOX. (XF-812) (TV-PG; V)

Cast: David Duchovny as Agent Fox  Mulder, Gillian Anderson as Agent Dana Scully, Robert Patrick as Agent John Doggett, Mitch Pileggi as Assistant Director Walter  Skinner

Guest Cast: Deep Roy as Beggar Man; Christopher Hutson as Mr. Burrard; Winston Story as Bellboy; Kiran Rao as Customs Agent; Jordan Blake Warkol as Quinton; Andy Hubbell as Quinton's Father; Ruth de Sosa as Quinton's Mom; Calvin Remsberg as Mr. Potocki; Jane Daly as Mrs. Holt; Jacob Franchek as Red-Headed Kid; Mimi Savage as Teacher; Michael Welch as Trevor; Maura Soden as Trevor's Mom; Tony Adelman as Trevor's Dad; Bill Dow as Chuck Burks