NASA sends a signal to an extrasolar planet showing conditions similar to Earth and then an intense battle develops when an international fleet of ships, on a naval war games exercise, comes across an alien armada.

Ellen Ripley is successfully cloned 200 years after her death in order to retrieve the alien queen inside her and create the ultimate weapon. Some of the alien queen was left inside Ripley, and she has taken on alien characteristics. She teams up with a band of smugglers to combat the cloned aliens.

Stargate is an intergalactic gateway, developed by an ancient civilization, that links planets from other solar systems to ours. The US Air Force assembles a Stargate team headed by Colonel Jack O'Neill for interstellar peacekeeping.

A comedic sci-fi drama based on the Dark Horse comic book series of the same name, this show follows a crash-landed alien who must take on the identity of a small-town Colorado doctor and somehow find a way to fit in with the local human population. While attempting to complete his secret mission on Earth, he is forced to consider the possibility that humans might be worth saving after all.

A jet jockey, a science nerd, the U.S. president, and other diverse survivors of a massive attack on earth join forces to defeat the aliens before they can achieve total victory.

Communication has failed at a remote research station on Mars and the only ones allowed in or out are the heavily armed Space Marines who arrive to neutralize an unknown enemy.

An alien whose ship crashes in Wisconsin is found by a distraught widow and assumes the form of her dead husband to convince her to drive him to Arizona where his mothership must pick him up in three days or he will die.

A soldier from the future lands on Earth during the Iron Age and finds himself uniting the Vikings in a war against a fierce monster that has followed him through space.

Cindy Campbell and her self-serving, sex-crazed pal Brenda are joined by Tom Ryan, a cute, but utterly clueless guy. Together, they battle to save the world from a ruthless alien invasion. Cindy moves in next to Tom because she's taking care of an elderly lady. She finds out the house is haunted by a little boy and goes on a quest in the village to find out who killed him and why.

A troubled child summons the courage to help a friendly alien escape Earth and return to his home-world.