Shawn and Gus board a ferry bound for The Channel Islands. They're volunteering for environmental cleanup, along with other nature lovers and a group of four prisoners on work detail. After Gus gets seasick, he and Shawn take a wrong turn, then run into CRAIG, the prison guard, who has been tied up and gagged. Craig tells them that the prisoners he was guarding escaped and are loose on the ferry. Shawn calls Henry and tells him the news. Craig, Gus, and Shawn find themselves in a standoff with the prisoners, who are demanding to be let go on the life raft. NORTHCUTT, one of the prisoners, then ups the stakes: If they are not able to safely escape the ferry, then they will start shooting hostages. SBPD surrounds the ferry and assesses the massive hostage situation they now have on their hands. A tense countdown ensues, and just as we think Northcutt has carried out his threat and shot two innocent hostages, tear gas is launched onto the boat. SBPD storms the ferry, apprehends the inmates and rushes the injured hostages to safety. But Shawn then swiftly points out that the injured "hostages" they took were actually inmates in disguise. So now they have two prisoners on the loose, one of which is Northcutt.