Aliens in a corn field

Round alien crash-landed in the yard of the farmer who abhors other than squares. Will they be able to get close?

A man is trying to sell a piece of land with a crop circle on it. An FBI agent tries to arrest him for this, but he gets away. He find instead an alien tool, which a shape shifting alien steals back. He/she shows the agent the crop circles as a trade for keeping the land. A spaceship lands and the agent enters it. He finds a decaying alien, with an egg on it. He gets chased by another alien and kills it, only to have it regenerate and kill him. The agent is healed by an alien and knows they'll return!

A cow is taken by aliens.

A man walking on the fields encounters an alien visitor from outer space.

Mike, Bob, and Frank land on Earth for a routine scientific exploration, but when strange occurrences pop up, will these creatures from another planet chicken out?

A group of extra-terrestrials determined to take over the earth and make it their new home, station themselves in a canyon and set about their task.

For decades, mankind has witnessed the mystery of crop circles - the often beautiful but always baffling markings that appear in fields the world over. Previously dismissed by skeptics as the work of clever hoaxers, crop circles are now the focus of increasing scientific investigation. How can complicated crop circle designs appear in just minutes, often in complete darkness? Why does the crop undergo changes at the cellular level? What about the strange lights which appear over the fields where crop circles are found? Are crop circles the product of new military technology? Or are they messages from an intelligent force, perhaps an alien civilization? Experience a powerful eyewitness account of a crop circle being formed. What are crop circles trying to tell us?

Government special agents are sent to the hills of Arkansas to investigate an alien abduction. The agents meet and "team-up" with some back woods hillbillies to infiltrate the alien's mother ship. Once aboard the spacecraft, hillbillies and government agents alike must fight for their lives and escape their alien foes!