The space shuttle Churchill is assigned to observe Halley's Comet under the command of Colonel Tom Carlsen. They see a strange form attached to the comet and Carlsen goes with a team to investigate. They find three humanoid life forms in caskets and they bring them to the Churchill. However, Earth loses contact with the shuttle and the Space Research Center sends another spacecraft to search the Churchill. They find the crew dead and the shuttle burnt and one rescue pod missing. They bring the...

A squad of National Guards on an isolated weekend exercise in the Louisiana swamp must fight for their lives when they anger local Cajuns by stealing their canoes. Without live ammunition and in a strange country, their experience begins to mirror the Vietnam experience.

A trooper with the British Special Air Service (SAS) infiltrates a radical political group who are planning a terrorist operation against American dignitaries. A glamourized look at the methods and tactics of the famed British anti-terrorist squad.The SAS are a elite army unit which as well as its Anti terrorist role also performs covert and overt training of friendly countries armed forces and operates enemy lines.

A pair of shuttle astronauts leave their spacecraft to repair a satellite. There's an explosion. NASA loses contact for two minutes, but the both are rescued and safely returned to Earth. Eventually it becomes evident that neither of the astronauts is quite the same.

Rick has been given a new identity by the FBI for helping convict a drug dealing FBI agent. Fifteen years later his former fiance recognises him. Rick's FBI 'minder' has been replaced by a corrupt agent who helps the drug dealing FBI agent and his accomplice locate him. There are many subsequent chase scenes as Rick and girlfriend revisit his former haunts.