who directed it?
Christopher Nolan
Dunkirk (2017 film)
Dunkirk is a 2017 war film written, directed, and produced by Christopher Nolan that depicts the Dunkirk evacuation of World War II. 
when does the movie dunkirk come on tv 2017 what is its genre? A war film.
wiki:14979882
Dunkirk (2017 film) [SEP] Introduction
Dunkirk is a 2017 war film written, directed, and produced by Christopher Nolan that depicts the Dunkirk evacuation of World War II. Its ensemble cast includes Fionn Whitehead, Tom Glynn-Carney, Jack Lowden, Harry Styles, Aneurin Barnard, James D'Arcy, Barry Keoghan, Kenneth Branagh, Cillian Murphy, Mark Rylance, and Tom Hardy. The film was distributed by Warner Bros. "Dunkirk" portrays the evacuation from three perspectives: land, sea, and air. It has little dialogue, as Nolan sought instead to create suspense from cinematography and music. Filming began in May 2016 in Dunkirk and ended that September in Los Angeles, when post-production began. Cinematographer Hoyte van Hoytema shot the film on IMAX 65 mm and 65 mm large-format film stock.