In June 1962, Frank Morris and brothers John and Clarence Anglin vanished from Alcatraz, the prison designed to be inescapable, leaving behind only dummy heads in their beds and a raft made of stolen raincoats. More than 64 years later, their fate remains one of America’s great unsolved mysteries. This episode unpacks the ultimate locked-room escape and the evidence that keeps the case alive.

We meet the crew, including the mastermind Morris with his 133 IQ and the Anglin brothers who swam in icy Lake Michigan as children, then walk through six months of secret digging, a vacuum-motor drill hidden by accordion music, and the night the plan nearly fell apart. We weigh the FBI’s drowning conclusion against decades of conflicting clues.

• The paper-mache dummy heads made with real hair from the prison barbershop
• Why fourth man Allen West was left behind, trapped by his own hardened cement
• The Delft University current study suggesting an 11:30 PM launch could have reached shore
• The unsigned 2013 letter, the disputed Brazil photograph, and the stolen blue Chevrolet
• How MythBusters and Mark Rober proved the raincoat raft and paddles were viable