Sherlock Jr. is a 1924 American silent comedy film directed by and starring Buster Keaton and written by Clyde Bruckman, Jean Havez, and Joseph A. Mitchell. It features Kathryn McGuire, Joe Keaton, and Ward Crane. In 1991, Sherlock Jr. was selected for preservation in the United States National Film Registry by the Library of Congress as being "culturally, historically, or aesthetically significant." In 2000, the American Film Institute, as part of its AFI 100 Years... series, ranked the film #62 in its list of the funniest films of all time (AFI's 100 Years... 100 Laughs). Plot Buster is a movie theater projectionist and janitor. When the cinema is empty, he reads a book on How to be a Detective. He is in love with a beautiful loveable girl. However, he has a rival, the "local sheik". Neither has much money. He finds a dollar note in the garbage he swept up in the lobby. He takes it and adds it to the $2 he has. A girl comes and says that she lost a dollar. He gives it back. But then a sad old woman also says that she lost a dollar, so he gives that also, leaving himself with $1. A man comes and searches the garbage and finds a wallet full of money. The projectionist buys a $1 box of chocolates, all he can afford, and changes the price to $4 before giving it to her at her house. He later gives her a ring. The sheik comes into the house and steals the girl's father's pocket watch and pawns it for $4. With the money, he buys a $3 box of chocolates for the girl. When the father notices that his watch is missing, the sheik slips the pawn ticket into the projectionist's pocket unnoticed. The projectionist, studying to be a detective, offers to solve the crime, but when the pawn ticket is found in his pocket, he is banished from the girl's home. However, when the sheik leaves, he walks closely behind him and shadows every movement. The girl takes the pawn ticket to the pawnbroker and asks him to describe who pawned it. He points to the sheik outside. While showing a film (advertised in the lobby as "Hearts and Pearls") about the theft of a pearl necklace, the projectionist falls asleep and dreams that he enters the movie as a detective, Sherlock Jr. The