The Flash: Season Zero — DC Comics
Issue: #21
What was Leonard Snart like before he acquired his cold gun and became one of The Flash’s most dangerous enemies? The origin of Captain Cold is revealed!
Creators: Nick Filardi, Alex Antone, Deron Bennett, Lauren Certo, Brittany Holzherr, Eric Gapstur, Phil Hester, Andrew Kreisberg
Characters: Barry Allen, Joe West, Captain Cold
Story arcs: Of Ice and Fire