The army challenges the navy in a singing contest.

A middle-aged businessman meets a band of rowdy youths and is smitten by one, named Francesca.

A couple of friends aspiring to join film land get mixed up in a robbery, ordered by a mafia boss who wants to seize the evidence he needs to blackmail an American politician.

While an admiral's son is hunted by secret agents, his sister plays his part on a warship.

Upon his return from battle in the previous film, the great warrior Hercules learns that his lover, Daianara, has lost her senses. Acording of the oracle Medea, Dianara's only hope is the Stone of Forgetfulness which lies deep in the realm of Hades. Hercules, with two companions, Theseus and Telemachus, embarks on a dangerous quest for the stone, while he is unaware that Dianara's guardian, King Lico, is the one responsible for her condition and plots to have the girl for himself as his bride upon her revival.

A rock band called "The Trip" want to get to Montecarlo to take part in a festival. Due to a series of circumstances however they end up in the place they set about the journey from: Rome. There is a music festival on at The Terme of Caracalla and they sing there.

Sherlock Holmes and Dr. Watson embark on a search for Cleopatra's ancient necklace, which has been stolen.

An outspoken boy and a gunfighter-pimp save a drifter's life from hanging. The boy's uncle dies, leaving a house and some dry, useless land to the boy. The dying uncle has obtained the drifter's promise to help the boy get what is his. Meanwhile the gunfighter has decided that the drifter should marry his daughter after being with her previously. The two get into a series of brawls and shoot-outs until they arrive in the town and find the boy's inheritance -which turns out not to be as useless as it first appears.

The Italian Vittorio Coppa works as a sleeper car commuter and commutes regularly between Munich and Rome. Because he believes that true love exists only in connection with marriage, he is secretly married twice.

The marquis Galeazzo di Torre Alta is murdered by a mysterious killer who calls himself Diabolicus. His heirs are his three brothers and a sister, but all of them, with the exception of Monsignor Antonino di Torre Alta, are killed by Diabolicus. The police are unable to solve the case, but when Antonino gives his inheritance to Pasquale Bonocore, illegitimate son of his father and Pasquale is in prison and therefore can't be the killer, all the clues are in the hand of the police.