AllMovie

King Arthur returns and tries to save modern England in this British comedy. When bank robber Arthur sustains a head injury due to a heavy object shaken loose during his neighbor's vigorous lovemaking, the addled thief believes himself King Arthur incarnate. His mission is to save England from itself. He slowly gathers 'round him a host of exploitive knights led by "Merlin," who is in reality a taxi driver. Merlin and his gang of criminals plan to get Arthur to reveal the locale of the money he stashed before his head injury. Arthur ends up questing toward London where he encounters Arabs endeavoring to bomb the Parliament.