Captain Cold (Leonard Snart) is a supervillain appearing in American comic books published by DC Comics. He is the leader of the Rogues, a loose criminal association, as well as the older brother of Golden Glider. An adversary of the various superheroes known as the Flash, he has served as one of Barry Allen's archenemies, both adversary and begrudging ally of Wally West, and one of the killers of Bart Allen. As part of 2011's The New 52 reboot, Captain Cold and his team live by a code to never kill. The character has been substantially adapted from the comics into various forms of media, including television series and video games. Actor Wentworth Miller portrayed Captain Cold in The CW's Arrowverse television series The Flash and Legends of Tomorrow. In 2009, Captain Cold was ranked as IGN’s 27th Greatest Comic Book Villain of All Time. Publication history Created by John Broome and Carmine Infantino, the character made his first appearance in Showcase #8 (June 1957). Fictional character biography Leonard Snart was raised by an abusive father and took refuge with his grandfather, who worked in an ice truck. When his grandfather died, Snart grew tired of his father's abuse and set out to start a criminal career. Snart joined up with a group of small-time thieves and in planning out a robbery, each was issued a gun and a visor to protect their eyes against the flashes of gunfire. This visor design would later be adapted by Snart into his trademark costume. In recent years he has added a radio receiver to them which picks up the police band to monitor local law enforcement. Snart and the other thugs were captured by the Flash and imprisoned. Snart decided to go solo, but knew he had to do something about the local hero, the Flash. DC Comics lists Leanord Snart's height as 6 Feet 2 Inches tall; In notable games that include Captain Cold like Injustice 2, his sprite appears to be similar to most characters. Snart read an article that theorized that the energy emissions of a cyclotron could interfere with the Flash's speed. He designed a weapon to harness that power and broke into a cyclotron lab, intending to use the device to charge up his experimental gun. As he was finishing his experiment, a security guard surprised Snart. Intending to use his gun only to scare the guard,