Graham John Yost born September 5 1959 is a Canadian film and television screenwriter His bestknown works are the films Speed Broken Arrow and Hard Rain and the TV series Justified In 2002 he created the widely acclaimed yet shortlived drama series Boomtown He has also written for the television series Hermans Head and Band of Brothers He also created the shortlived NBC drama Raines Yost teamed up with Tom Hanks and Steven Spielberg along with two of his fellow Boomtown writers Michelle Ashford and Larry Andries to write and direct episodes of the HBO miniseries The Pacific As of 2010 Yost is the creator and executive producer of the series Justified which premiered on FX in March 2010 Born in Etobicoke he is the son of Canadian television personality Elwy Yost the longtime host of the public broadcaster TVOntarios Saturday Night at the Movies He lives in California with his family