S5, E15: While researching unsolved killings in which the victims' organs were removed, Mulder uncovers a species-altering experiment that may be traced back to his own father.

Starring Darren McGavin, Mitchell Kosterman, J. Douglas Stewart
S5, E15: While researching unsolved killings in which the victims' organs were removed, Mulder uncovers a species-altering experiment that may be traced back to his own father.