A masterpiece of physical comedy, electrifying stunts, and ming-bending special effects, Sherlock Jr., ranks as one of the greatest films of all time.

Buster Keaton, who stars and directs, packs the screen with one thrilling set piece after another, each more ingeniously designed than the last. Like his contemporaries Charlie Chaplin and Harold Lloyd, Keaton performed his own death-defying stunts. But Keaton’s daring and audacity is on another level, equalled only perhaps by the dizzying acrobatics of Jackie Chan, who greatly admired Keaton.

Along with his command of action, Keaton was blessed with impeccable comic timing, and the thrills in Sherlock Jr. are matched note for note with gut-busting laughs.

But the centrepiece of the film is a delirious special effects sequence, one whose power to astonish remains as potent as ever.

Sherlock Jr. is not to be missed.