1943 was a year in the 20th century.
- Dates Unknown:
- Milton Baines was born.
- While teaching at the California Institute of Technology, Emmett Brown convinced Robert Millikan to get him an interview for the secret project for which he deduced the United States government was recruiting. Despite the disastrous interview, where Brown pretended the home of his landlady was his own, Emmett was given a job working for the Manhattan Project.