Apple has unveiled the teaser trailer for the historical drama Killers of the Flower Moon [KOTFM] based on the book by David Grann. Set in 1920s Oklahoma, the film depicts the serial murder of members of the oil-wealthy Osage Nation, a string of brutal crimes that came to be known as the Reign of Terror. Directed by Martin Scorsese [MSCOR], the film stars Leonardo DiCaprio, Robert De Niro, Lily Gladstone, Jesse Plemons, Tantoo Cardinal, Cara Jade Myers, JaNae Collins, and Jillian Dion. After premiering at the Cannes Film Festival, Killers of the Flower Moon will open in theaters on October 6th distributed by Paramount.