"The Beatles tours were like Fellini's Satyricon," John Lennon once remarked, and seeing the director's 1969 masterpiece of decadence again, you can only wonder how they made it through alive. A bleak but visually stunning crawl through the paranoia, bisexuality and corruption of ancient Rome, it's hardly easy viewing, but stunning all the same as a lurid portrait of a world tipped over into the realms of madness.