They stop at the police station to get help gaining access to Hicks' house.  Lassiter and Juliet are hard at work on a missing person's case, a university professor named Renaud, and Vick, still stung by their defection, is in no mood to help, either.  But she softens when Shawn tells her he only agreed to work with Barbara to get evidence that will bring the case back under Vick's jurisdiction.  At Hicks' house, Shawn and Gus find emails from someone threatening to go to the authorities.  They realize this person, not Hicks, was the anonymous tipster.  They also find the dead body of Professor Renaud, Lassiter and Juliet's missing person.  Shawn and Gus call both the cops and the Coast Guard to the house, where they tell them that Renaud was the geologist Ashley Bamford hired.  He worked on the rig with Hicks and was the anonymous tipster.  He discovered something unsafe and was emailing Hicks about it, who then killed Renaud to keep it secret.  Both Vick and Barbara thank them for their help but say they will each take it from there.  Shawn and Gus decide to get back to the rig on their own to see if they can find out just what Renaud had discovered.

Back at the police station, Barbara goes to see Vick and tells her that the Coast Guard discovered someone had tampered with the crane that got loose and killed Hicks.  Shawn was right, Hicks was murdered.  Vick tells her Shawn was also right that Hicks killed Renaud.  Putting their differences aside, they decide to find Shawn together to see what else he knows.  But he and Gus are already on the rig, where they break into Renaud's office and discover evidence that, contrary to the map they saw earlier, the rig is located directly on a fault line.  Ashley finds them and they warn her that her father made fake maps and is drilling on a fault line.  Also, he may be involved in the deaths of Hicks and Renaud.  But it turns out that Ashley is the real culprit, and she turns the tables on them, locking them in a closet to make her escape.  As she heads off the rig, she runs into the cops and Barbara, who have just arrived.  They tell her they found out she was on the rig the night of Hicks' death but kept her name of the manifest.  Ashley then pulls a gun on them and takes off running.  Lassiter, Juliet, Vick and Barbara give chase.  Lassiter and Juliet find Shawn and Gus and let them out.  A gunfight ensues as they all then track down and corner Ashley, but Shawn, telling her he understands what it's like trying to live up to a father's expectations, is able to talk her down and disarm her without anyone getting hurt.  With the case wrapped up, everything goes back to normal, including Vick's relationship with Barbara.  The rivalry is back on, she tells Shawn and Gus, and she's winning.

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