Alien Species (1996)

Stars:

Charles Napier, Hoke Howell, David Homb

A fleet of UFOs is circling the Earth and a top scientist races to discover their true intentions for the planet. When the UFOs begin an attack on Earth, the scientist finds himself thrown in with a sheriff and his deputies transporting some prisoners to jail. The unlikely group is forced to seek shelter from the attack in a nearby cave, not knowing how significant the location is to the alien's plans.