Expediente X Temporada 5 Episódio 2

The Cigarette-Smoking Man helps Mulder to obtain Scullys cure and also lets him see his real sister who doesnt turn out to be as happy to see Mulder as he wouldve liked. In return for this, the Cigarette-Smoking Man asks that Mulder quit the FBI and work for him in the Syndicate where he could have power and respect which Mulder turns down, deciding to stay on the side of justice. While Scullys cure appears to have worked, the Cigarette-Smoking Man faces his own enemies and disappears, presumed dead.