The staff continue to assist those affected by the storm. Meanwhile, Callie makes a bold decision regarding her relationship with Arizona, and tragic news brings the doctors together.

The BAU looks for a suspect and a motive when victims are found in truck stop restrooms in the South.

Following the storm, a mudslide injures first responders and citizens; Meredith faces a decision that will impact a loved one; Callie is rocked by Arizona's infidelity.

When Emily finds out who was responsible for her father's murder, Victoria's pawns become entangled in an insidious cover-up; as Declan gives his testimony, his relationship with a self-destructive Charlotte unravels.

The Graysons unite in the face of recent scandal; Emily becomes increasingly anxious; Amanda's location is questioned.

Mulder and Scully discover more evidence of the planned alien colonization of Earth and set out to preserve what may be humanity’s last remaining link to freedom.

After a group of alien abductees is buried alive by faceless assailants, the agents uncover proof that the event is linked to alien colonization.

The agents search for answers when Cassandra Spender mysteriously reappears.

The agents attempt to prevent an alien invasion of Earth.

Kit hires a surgical coach to watch over Bell and Raptor and help them brush up on their skills; Conrad contemplates jumping back into the dating scene; Devon works with an elderly couple.

Ruth dreads George's return from the hospital; Nate and Brenda prepare for a big day; David and Keith discuss alternative parenting options.

Nate is at odds with Lisa's family; David and Keith look for ways to start over; Federico seeks out a priest for absolution.

Nate and Maya attend a memorial for Lisa; David and Keith are inspired by a wedding; George agrees to Ruth's marriage stipulations.