Punisher: The Cell (2005) #1 (The Punisher (2004-2009))

From the darkest bowels of Riker's prison, the old men preside over their empire. Nothing goes down without their say-so; no one draws a breath without their permission. And when a riot explodes, they need only fortify their defenses and ride it out. But someone else is weaving his way through the bloodstained halls, their newest neighbor: Frank Castle.