Vittorio De Sica, 1948. A father and son search post-war Rome for the stolen bicycle he needs for work. Italian neorealism's keystone.
From Wikipedia
Bicycle Thieves, also known as The Bicycle Thief, is a 1948 Italian neorealist drama film directed by Vittorio De Sica. It follows the story of a poor father searching in post-World War II Rome for his stolen bicycle, without which he will lose the job which was to be the salvation of his young family.