Baby aliens parents return to wreak havoc on the city holding it captive.
During a flashback scene, when the aliens invade the lower sector of the base, a woman says, "They're here," in a tone similar to Heather O'Rourke's.
Time travel/time altering device
Towards the end Milly starts to fade away, similar to the instances in Back to the Future.
The main villain has colorful banter each time his henchmen are killed by the protagonist in a manner much like how Hans Gruber (Alan Rickman) reacted.
the films alien uses a human telepathically to speak.
VHS/DVD release reviewed + footage used