Mulder and Scully track a legendary creature that has roamed the New Jersey countryside for over forty years.
The crews work to contain a dangerous forest fire and save a group of environmentalists protesting a housing development.
In Summer 1999, Megan wants to be adventurous and makes fake IDs for the gang. In Winter 1999, a burst pipe leads the Landrys and Isabella to a messy night at the Chambers house. Isabella wants to help but is met with resistance from Megan.
Walter travels to the Alternate Universe to assist in the investigation of a Fringe event with ties to both worlds. Meanwhile, David Robert Jones reveals his next target.
Mulder and Scully are stalked by a deadly new life form that has invaded the bodies of a volcanic research team.