An underground government facility is locked down by its A.I.-controlled computer when an alien entity travels through a dimensional portal and threatens the lives of everybody inside.
The Glimmer Man
Xtro
Slipstream
The Guardian
Multiverse
Razorback
Hell's Bloody Devils
Mary Jane's Mishap
Xtro 3: Watch the Skies
Teenage Mutant Ninja Turtles II: The Secret of the Ooze
Oppenheimer
PK
Shutter Island
Ex Machina
Eden Lake
12 Angry Men
Titanic
Julieta
Pierrot le Fou
Cries and Whispers