Terror by Satellite

Trouble aboard the satellite observatory which has been established to circle the Earth every four hours. It is under the despotic control of a brilliant but unbalanced scientist, Commander Hendricks, who refuses to allow his staff any means of communicating with Earth on their own account. But he doesn't know that Tony Hale, who is one of the engineers in the observatory, has smuggled in his homemade transistor radio. Scientists everywhere are baffled when three brown streaks appear on the Eart