Fox, launched in 1986, was still a young network in 1993, having expanded to programming six nights a week just the year before. “The X-Files,” with FBI agents Fox Mulder (David Duchovny) and Dana Scully (Gillian Anderson) investigating odd occurrences, brought Fox some of the best reviews and most enthusiastic viewer response of the network’s short life.

But Glen Morgan, whose new series “Intruders” arrives next Saturday on BBC America, doesn’t remember anything like total freedom.

Morgan, credited as a producer or writer on 51 episodes of “The X-Files,” said, “That first year, (Fox) wanted the show to be like, ‘Oh, who do Mulder and Scully help today?’” he recalled. “Chris didn’t want to do that show, and he stood his ground. You can get a difficult reputation, but I think that’s what I learned the most.”

Plus, Morgan said, “All of us, Howard (Gordon) and Jim Wong and Alex (Gansa), all of us together kind of taught each other how to tell a mystery like that on TV, and to serialize it.”

That made Morgan, who also wrote for Carter’s “Millennium”(1996-98), an ideal candidate to turn Michael Marshall’s creepy 2007 novel “The Intruders” to television.