Mexican Prison Escape

S2013 E6: In the summer of 1972, five young Americans are caught trying to smuggle more than 2,000 pounds of marijuana out of Mexico. While awaiting trial, they are sent to Mazatlan Prison and desperately begin planning their escape. For six weeks, the group tunnels through a concrete wall using a butter knife and some rocks, only to find that they're sitting on top of water that won't stop gushing through the dirt floor. Will these detainees be able to escape one of Mexico's most violent prisons?