The crew of the Discovery watching Sherlock Jr.
Sherlock Jr. was a comedic silent movie from the early 20th century, starring Buster Keaton.
In 3189, the crew of the USS Discovery watched a showing of this film in the shuttlebay. (DIS: "Forget Me Not")
This film, released in 1924, was selected for preservation in the United States National Film Registry by the Library of Congress in 2000. The film entered the public domain in 2020.