Mulder and Scully learn that they aren’t the only ones desperately searching for their long-lost son, William. The very fate of the world may depend on it.

The Runaways are feeling more fractured than ever when Molly arrives with a devastating message from her parents. Now the kids have to stop their parents before it’s too late.

As tensions heat up among the team at Mutant HQ, no one knows who they can trust. Fearing for his family’s safety, Reed rethinks their future at the compound. Meanwhile,…