Michael Puttonen

A test pilot who may have been flying aircraft made with alien technology disappears, and Mulder and Scully must defy their own government to find the truth.

In this special episode, Oliver Queen (recurring guest star JUSTIN HARTLEY), aka the Green Arrow, sends out for reinforcements--and Bart Allen (recurring guest star KYLE GALLNER), aka Impulse; Arthur "AC" Curry (recurring guest star ALAN RITCHSON), aka Aquaman; and Victor Stone (recurring guest star LEE THOMPSON YOUNG), aka Cyborg, return to Smallville to help Oliver take down a secret LuthorCorp laboratory. During a break-in at the facility, Bart is captured and tortured by Lex, but when Clark tries to rescue him, he is felled by meteor rock. An alarmed Chloe goes to Oliver for help, and the newly formed league springs into action to rescue Clark and Bart.

Mulder and his new partner, Alex Krycek, face a sleep-deprived marine who may possess the ability to kill with his dreams.

The agents' investigation into the government's knowledge of extraterrestrial life puts them in danger; Scully is forced to trust a mysterious man.

When ghostly images of female victims appear near murder scenes, Mulder and Scully conclude the apparitions may be harbingers of death for those who see them.