The future of the X-Files project is jeopardized after Mulder secretly infiltrates the government cover-up of a UFO crash.
Margaret and Francey enlist the help of a popular true crime podcaster to help exonerate a client who is serving a life sentence; Todd solicits dating advice from his sister and Susan when sparks fly between him and Lea.
When a deadly, viscous organism is discovered inside a strange rock, the agents race to determine the rock's origin.
To gain tangible proof the organism inside the rock is an alien entity, Mulder joins forces with the duplicitous Krycek and comes face to face with the starling depths of his deception.
Olivia uncovers a dangerous force that may be connected to Walter’s past experiments with the drug Cortexiphan. Their investigation forces Walter to leave the lab for the first time in years as he and Olivia head to Massive Dynamic in New York to examine old case files. Walter struggles with life outside the lab as he comes face-to-face with the demons of his past.