17. It Happened One Night (1934)
Influential, how? The original romcom.
Bagging itself the top five Oscars, the Clarke Gable-Claudette Colbert sleeper hit not only spawned a generation of screwball comedies, but established the 'loathe at first sight' blueprint that three out of five Hollywood romcoms have been following ever since.
Money Shot: Grudgingly sharing a room together, the duo trade rapid-fire quips.
18. Le Roman D'Un Tricheur (1936)
Influential, how? The art of narration.
Sure, there’d been earlier voiceovers – but never before had the main character told us his own tale.
Sacha Guitry (writer, director, lead actor) dances us through the life of his self-styled ‘Cheat’, dispensing with dialogue. Ealing's Kind Hearts And Coronets is a direct descendant.
Money shot: Sent to bed early, our hero sees his family die of food poisoning.
19. Snow White And The Seven Dwarfs (1937)
Influential, how? Calling the 'toon.
"No one's gonna pay a dime to see a dwarf picture..."
Even Walt Disney's wife mocked his first feature-length 'toon, but Walt was vindicated in the end - Snow White took home $66m and seven Oscars.
It set the template and the quality-bar, too.
Money shot: Snow White cleans Chez Dwarf with fwuffy forest animals.
20. Stagecoach (1939)
Influential, how? New Western frontiers.
Both the Western and John Ford has been around for decades when the latter revitalised the former with a modern, mature, myth-making 'road' movie.
Orson Welles watched it 40 times before making Citizen Kane. 'Nuff said.
Money shot: The seminal stuntwork as legendary daredevil Yakima Canutt is dragged beneath galloping horses.