Invaders from Mars

While watching for a planet that may collide with earth, scientists stationed in Scotland are approached by a visitor from outer space.

A small-town doctor learns that the population of his community is being replaced by emotionless alien duplicates.

Test space rockets exploding at liftoff and increased reporting of UFO sightings culminate in a direct attempt by alien survivors of a dead, extra-galactic civilization to invade Earth from impervious flying saucers, using ray-weapons of mass destruction.

The first manned expedition to Mars is invaded by an unknown life form, which stows away on the rescue ship.

Starship C57D travels to planet Altair 4 in search of the crew of spaceship "Bellerophon," a scientific expedition that has been missing for twenty years. They find themselves unwelcome by the expedition's lone survivor and warned of destruction by an invisible force if they don't turn back immediately.

Ben and a mysterious girl from his past must prevent an alien threat from destroying the world.

In Arborville, California, three high school students try to protect their hometown from a gelatinous alien life form that engulfs everything it touches.

A cybersecurity expert becomes a whistleblower after uncovering secrets about aliens, putting him on the run from a corporation. Meanwhile, a meteorologist experiencing strange phenomena joins forces with him to prove there's life beyond our understanding.

Ba'al travels back in time and prevents the Stargate program from being started. SG-1 must somehow restore history.