An accident at a nuclear research facility creates a dimensional doorway in which aliens need to widen to invade our world. A scientist races to discover a way to reverse the damage and close the doorway.
Did You Know?
Star Trek TOS number of 6 (possibly the highest for any movie or series episode). Leonard Nimoy, Rudy Solari (Paradise Syndrome), Joseph Ruskin (Gamesters of triskelion), Willard sage (the Empath), Robert Fortier (By Any Other Name), Vic Perrin (voice of Nomad, episode The Changeling and others). See more
After Dr. Marshall finishes assembling the fusion bomb, he leaves it in the fissionable materials vault and locks the door. He is still inside at the time, and there is no other way for him to leave the vault. See more