Leonard "Lenny" Snart ~ "There are no strings on me".

Leonard "Lenny" Snart (born June 2, 1972), nicknamed Captain Cold by Cisco Ramon (or simply Cold), is a world-class thief from Central City. He is also the older brother of Lisa Snart and the son of the late Lewis Snart. In early 2016, Leonard was recruited by the rogue time-traveller Rip Hunter on a mission to take down Vandal Savage.

Spoilers Ahead!!!

In 1975, Leonard woke up one night and went downstairs to get some water. He happened upon an older version of himself, under the pretense that he was a friend of his father's, who gave him advice to always look out for himself. His father appeared, causing him to return upstairs. Days later, his father was arrested for attempting to sell the Maximillian Emerald, causing him to be sent to jail for 5 years.

When his father was released, he began to take his anger out on Leonard. His sister, Lisa, was soon born and was equally abused. Lewis turned to crime, mostly breaking and entering, bringing his young son along so that he could help him to disable the security systems during the heists. Sometime later, Lewis was sent to prison. Leonard's grandfather took him and his sister to a diner right across from Central City Precinct named the Motorcar. Snart kept going there in his later life to listen to police radios and learn their response times. While Lewis did frequent sentences in and out of prison, Leonard mostly raised Lisa himself and thus shares an almost parental bond with her, despite their vastly different personalities. While in juvenile detention at the age of 14, Snart was jumped by several guys and almost stabbed with a shiv until Mick Rory intervened and defended the scrawny teenager, the two forming a close partnership. He dropped out of high school and eventually became a bank robber, putting together a crew. Every six months or so, he arrived in Central City to case a job for a few weeks, and disappeared after stealing his target. He became one of Central City's Most Wanted. He worked on a job with Rory, which ended badly for the latter. Snart ended the partnership between the two when Rory lost control of his pyromania while on a job, burning down the building they were inside of. Snart escaped without injury while Rory received severe burns.

In January of 2016, Snart and his partner Mick Rory conducted a heist on Central City Bullion Exchange and were making their escape in a mini-van when they were intercepted by Rip Hunter, who took them to Star City alongside several other heroes.

Once Snart and Sara freed the rest of the team from their holding cells in the Vanishing Point, Rip decides to go back so they can destroy the Oculus to make sure their actions won't be controlled meaning they would have a chance to stop Savage. Palmer set it to self-destruct but found out it had a fail-safe meaning someone had to stay behind to make sure it blew up. Rory decided to stay behind and the rest of the team left towards the Waverider but Snart went towards Rory to knock him out so he could stay behind, sacrificing himself. The team's mission was successful, as the incoming explosion destroyed the Oculus device, along with many of the structures around it in the Vanishing Point leaving Snart's fate unknown, presumed deceased.