Watch The Cabinet of Dr. Caligari

Murnau's unauthorised Dracula, with Max Schreck's rat-faced count climbing the stairs in shadow.

Lang's 1927 city of the future: the Maschinenmensch, the workers below and a look every sci-fi film borrowed.

The first Best Picture: a silent Great War dogfight epic with real biplanes and Clara Bow.

The Odessa Steps sequence, the pram, and the montage theory every editor still learns.

Chaplin eats his boot and dances with bread rolls in the Klondike.

Buster Keaton chases a stolen locomotive through the Civil War, doing every stunt himself.

A farmer plans to drown his wife and falls back in love with her in the city; Murnau in Hollywood.

Dreyer's trial in close-up, with a performance from Renee Falconetti that has never been matched.