Test space rockets exploding at liftoff and increased reporting of UFO sightings culminate in a direct attempt by alien survivors of a dead, extra-galactic civilization to invade Earth from impervious flying saucers, using ray-weapons of mass destruction.

An accused man helps a policeman investigate an airplane mechanic's death and a counterfeit racket.

An electric shock enables Sach to predict numbers, so the Bowery Boys are off to Las Vegas to win enough money at the roulette wheels to let their landlady buy an apartment building. Witnessing his winning streak, some gangsters decide to move in and find out his "system" for beating the odds.

Two detectives investigate the strangulation murder of a man whom everyone seemed to like.

An Eastern European escapes to America, where Communist agents try to track him down.