The Professor and the Madman is a 2019 biographical drama film directed by Farhad Safinia (under the pseudonym P. B. Shemran), from a screenplay by Safinia and Todd Komarnicki based on the 1998 book The Surgeon of Crowthorne (published in the United States as The Professor and the Madman) by Simon Winchester. It stars Mel Gibson, Sean Penn, Natalie Dormer, Eddie Marsan, Jennifer Ehle, Jeremy Irvine, David O'Hara, Ioan Gruffudd, Stephen Dillane, and Steve Coogan.

Plot

In London in 1872, William Chester Minor, a retired United States Army surgeon, is found not guilty by reason of insanity for killing an innocent stranger, George Merrett, and is sent to Broadmoor.