April realizes her true feelings; Vivian's health worsens, leaving Karen's future unclear; Joss looks for the killer.
Joss struggles with whether she should take a plea deal; Karen agrees to help Vivian keep her secret from Alec; Calista makes her next move.
When a scientist suddenly commits suicide, Mulder and Scully investigate what unseen force may have driven him to it.
Backstrom and the team have three days to save a teenage girl who was taken by an elusive online predator; the teen reminds Backstrom of a victim from an unsolved case.
Refugees from a war-torn country seeking asylum wash up on the beach of a small fishing town. But the country these people are from is America – and the war they are fleeing hasn't happened yet.
