A Man Called Magnum aka Napoli Si Ribella/Naples Turns On Itself is far from a forgotten classic. In fact, despite bland good cop Meranda's interesting relationship with his sidekick, an intriguing but underused twist involving the identity of a police informer and one good car stunt where he stops a train carrying two hit men by crashing his car on the tracks, it's pretty average in every department. The hero has little to do for the first hour as the various gangsters double-cross and kill each other over a hijacked drugs shipment and, a couple of chase sequences aside, there's not much action and even less imagination. Not objectionable and certainly watchable, but even in 1977 you'd seen it all before.