Steven Anderson

Vivien gives birth. Tate and Violet attempt to rid the house of some of its ghosts for good.

Scully fears that she and another pregnant women will give birth to alien babies.

A seemingly unstoppable Billy Miles begins killing scientists performing genetic research – then targets Scully.

When a student finds a former teacher's car keys in an old desk, Lilly and the team take a new look at the teacher's death, previously thought to be a fatal carjacking.

Abby becomes fixated on solving a murder; DiNozzo's latest fling leads to an interesting Halloween.

Lewis refuses the job as chief resident for next year. Weaver is appointed attending physician. Hathaway quits her job and threatens to leave Shep if he refuses counseling.