Mulder and Scully later learn of reports of rebel aliens burning doctors who were working on Cassandra Spender (Veronica Cartwright), an alien abductee and mother of Jeffrey Spender. Skinner takes Spender to the scene, where Cassandra asks for Mulder. She informs Mulder and Scully that the aliens are here to destroy all life on Earth. She claims that a rebel force of aliens are mutilating their faces to prevent infection by the black oil. Cigarette Smoking Man reveals everything to Diana Fowley, who agrees to help him and betray Mulder. Cassandra later escapes from a hospital and arrives at Mulder's apartment, demanding that he shoot her because she is the embodiment of fifty years of work by the Syndicate—an alien-human hybrid that will trigger colonization if the aliens learn of her existence.