The BBC iplayer is showing the classic New Hollywood film, In the Heat of the Night (1967).
The film is a classic civil rights movie which places a small-town Southern States community against a visiting African-American detective. He doesn’t want to be there, but he’s stuck passing through, and gets caught-up in a murder investigation. Sidney Poitier stars, and there is a terrific jazzy soundtrack by Quincy Jones.
Also, there is quite a lot of train action…
See also, Bad Day at Black Rock (1955)