John F. Showalter is an American director. Contents[show] Credits Arrow Director Season 4 "Broken Hearts" The Flash Director Season 1 "The Sound and the Fury" Season 2 "Family of Rogues" "Back to Normal" Constantine Director "A Feast of Friends" Supergirl Director Season 1 "Bizarro" DC's Legends of Tomorrow Director Season 1 "Left Behind" External links John Showalter at the Internet Movie Database Categories: Crew Community content is available under CC-BY-SA unless otherwise noted.
