Scientists must prove their time travel experiments can produce results, so their funding won't be cut off. They push their equipment, and travel 5000 years into the future, where they encounter aliens who are looking for a planet to colonize.

After Custer's defeat an army captain tries to warn a small town that the Sioux are coming. The inhabitants own two machine-guns but don't want to lend them to him.

The townsfolk are set on lynching an accused killer held in the town lockup. But US Marshal Johnny Reno stands in their way.

A masked lunatic kills off people in a haunted house.

The rebellious Thracian Spartacus, born and raised a slave, is sold to Gladiator trainer Batiatus. After weeks of being trained to kill for the arena, Spartacus turns on his owners and leads the other slaves in rebellion. As the rebels move from town to town, their numbers swell as escaped slaves join their ranks. Under the leadership of Spartacus, they make their way to southern Italy, where they will cross the sea and return to their homes.

Preacher Sam Stone and his new beautiful wife Jill stand by the grave of Sheriff Billy Kelly, who died trying to bring law-and-order to Emporia, Wyoming. Among the mourners are businessman George Gates, mayor Ned West and his daughter Patricia. The mayor rejects Gates' suggestion that he release gunfighter Waco from jail to clean up the town. When Patricia is attacked by a cowboy after leaving her boyfriend Scotty Moore, the mayor finally decides it is time accept the governor;s offer of amnesty for Waco. Jill Stone's first reaction, when learning that Waco has been released, is to leave town before Waco finds out that she, his former fiancée, has married the town preacher while Waco was in jail. Town boss Joe Gore is not overjoyed, either, but Ike and Pete Jenner eagerly await the chance to shoot Waco for the death of their brother. Written by Les Adams