Earth vs. the Flying Saucers

Earth vs. the Flying Saucers aka Invasion of the Flying Saucers, Flying Saucers from Outer Space, and Invasion of the Flying Saucers is a 1956 American blackandwhite science fiction film from Columbia Pictures, produced by Charles H. Schneer and Sam Katzman, directed by Fred F. Sears, and starring Hugh Marlowe and Joan Taylor.

When a saucer lands at Skyhook the next day, soldiers open fire, killing one exposed alien, while others and the saucer itself are being protected by a force field. The aliens then kill everyone at the facility but the Marvins General Hanley is captured and taken away in the saucer. Now too late, Russell discovers and decodes a message on his tape recording from the aliens they wanted to meet with Dr. Marvin and had landed in peace at Skyhook for that purpose. Now impatient to conduct that meeting because everything has gone sideways, Marvin contacts the aliens and steals away to meet them, followed closely by Carol and Major Huglin Donald Curtis. They and a pursuing motorcycle cop are taken aboard a saucer, where they learn that the aliens have extracted knowledge directly from the Generals brain he is now under their control. They claim to be the last of their species and have destroyed all the launched satellites, fearing them as weapons. As proof of their power, the aliens then give Dr. Marvin the coordinates of a naval destroyer that opened fire on them, and which they have since destroyed the Marvins are then released with the message that the aliens want to meet the worlds leaders in 56 days in Washington, D.C., to negotiate an alien occupation.Dr. Marvins later observations uncover the fact that the aliens protective suits are made of solidified electricity, and grant them advanced auditory perception. From other observations, Marvin develops a counterweapon against their flying saucers, which he then later successfully tests against a single saucer. As they escape, the aliens jettison Gen. Hanley and the motor cycle cop both fall to their deaths. Groups of alien saucers then attack Washington, Paris, London, and Moscow, but are destroyed by Dr. Marvins sonic weapon. The defenders also discover that the aliens can be easily killed by simple small arms gunfire once they are outside the force fields of their saucers. ........

Source: Wikipedia