The X-Files returns for its eleventh season on Wednesday, and it appears it will bring with it the long-awaited reappearance of the show's most mysterious character.

In this exclusive sneak peek of the premiere, a harried Scully (Gillian Anderson) explains to Mulder (David Duchovny) over the phone that he is in dire need of their son William, who was given up for adoption in Season 9. "I have to find our son. You need him, and I need you," Scully says before a series of migraine-inducing visions cause her to lose control of her phone and drop to the floor.

As Scully hears the voices of Mulder, the Cigarette Smoking Man (William B. Davis) and others discuss William's important role in the series' over-arching mythology, she sees the pained face of a young man seemingly experiencing similar agony to her own. Could this young man be our first glimpse of the teenaged William, who should be around 15 years old at this point? And if so, what's causing both him and Scully's such pain?

The truth is out there, but you'll have to wait until Wednesday at 8/7c to find out when The X-Files returns to Fox.