Mister Smith is a term used for male persons whose surname is Smith. Mister Smith can also mean: A placeholder name for a generic person (as Smith is a common English surname) - often exemplified as "John Smith" Mr. Smith (album), a hiphop album by rapper LL Cool J. Mr. Smith (novel), a novel by Louis Bromfield. Mr Smith (The Sarah Jane Adventures), a fictional extraterrestrial computer in the Doctor Who spinoff The Sarah Jane Adventures. Mr. Smith (TV series), a short-lived 1983 sitcom, with a talking orangutan as the title character.
https://en.wikipedia.org/wiki/Mister_Smith