`  14.07.09 ``I don't know how that got to be but i'm a big supporter of the X-files and i've like seen almost every episode and not once did it mention Mulder being the father of Scull'y baby``  Can't have watched very carefully can you? William being Mulder's son is frequently referenced to in the final episode. Just off the top of my head:  Guard: ``What are you thinking about?`` Mulder: ``My son. His mother.``  Scully: ``Our son, Mulder ...I gave him up. Our son. I was so afraid you could never forgive me.``  Not to mention the meaningful looks that Mulder and Scully give each other when the officiator at the hearing asks, ``Agent Scully, isn't it true that you and Mulder were lovers, and you got pregnant and had his love child?```