Catalina Denis

FBI Child Specialist Claire Bennigan investigates several cases that revolves around an imaginary friend named Drill. She draws up some disturbing details.

Drill continues to play with Minx, Henry, and Harper. Claire looks into his identity, and Minx admits to the security breach.

Sean and his hostage Dr Maria Benavidez are lead to a secret location. Meanwhile, Claire ands piece together Sean's target.

Henry plays one final game with Drill, Claire and Wes race to stop Sean, and Henry's parents are shocked to discover he can now hear and speak.

Sean, Wes, Claire, and Lena studies Thomas' past to discover the way of eliminating Drill. Meanwhile, Drill threatens Thomas in a new host's body.

Wes insists to the president that all children with symptoms be quarantined to weaken Drill. Sean confronts a reporter who wants to expose Drill to the world.