Deadwood: The Movie - made by HBO who made the brilliant TV series "Deadwood" (2004 - 2006)
Featured the same cast including British actor Ian McShane who played Al Swearengen in what was, in my opinion, his finest career performances for which he won a Golden Globe in 2005.
It was more of an extended final episode than a movie and was set 10 years on from the last series.
The last series ended with a number of unresolved plot lines leaving it open for yet another series which never happened. The movie resolved things, not a brilliant piece of work like the series but I am glad they did it.