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Mulder and Scully investigate the murders of two rocket scientists, all of which are linked to a severely handicapped janitor named Roland. Mulder suspects that another recently deceased scientist, whose head is cryogenically frozen, is controlling Roland telepathically from beyond the grave.
Dr. Nollette: If I've seen further than other men, it's because I have stood on the shoulders of giants.
Scully: Arthur and Roland Grable, born at Puget Presbyterian to Mr. and Mrs. Louis Grable on July 15, 1952. Arthur was four minutes older than Roland.
Mulder: Identical twins.
Scully: Which means that they're the result of a single egg fertilized by a single sperm.
Mulder: I've read studies which suggest that in some cases the identical twin arises very early in the embryonic stage when a mutation in one cell is rejected by the other cells as foreign.
Scully: So that maybe Roland's condition is the result of a damaged chromosome rejected by one of Arthur's cells?
Mulder: In a way, that would explain Arthur's genius and Roland's strange mathematical gift.
Why didn't these supposedly genius propulsion scientists just stand in the corner to one side of the fan instead of directly in the path of the wind?
Scully tells Mulder that chloroplasts are plant cells. Chloroplasts aren't plant cells, but rather parts of some plant cells.