A secret agent is sent to infiltrate the heavily guarded fortress of a madman bent on taking over the world.

The story of Spartacus and 10 other gladiators who rebelled against the bloody coliseum sports. They escape and are faced at every turn by Roman soldiers bent on taking them back to the Coliseum - dead or alive!

Bespectacled pistolero Stan Ross comes to Canyon City and becomes involved with two feuding factions, after a clerk has been killed by the banker Jefferson during a botched holdup, while robbing his own bank.

The ten gladiators are hired to travel to Arbela, a small country on the outskirts of the Roman Empire to learn if Parthia is planning to war with Rome. Upon arriving, the heroes decide to kidnap the beautiful Parthian queen and spirit her to Syria to serve as a hostage.

After accidentally killing an opponent in the ring, masked wrestler Superargo quits wrestling and, following the advice of his friend Col. Alex Kinski of the Secret Service, becomes a secret agent, using his superhuman abilities to stop villain Diabolicus' plans to wreck the global economy by turning uranium into gold.