Dex and Blake travel to Africa in episode 195, where they discover the business deal was a cover for illegal arms shipments. Sean had planned to set up Alexis and Blake to take the fall. Sean locks Blake and Dex on a tanker and plans to blow up the ship. At the last minute, Dex uses grenades from the arms shipment to blow a hole in the tanker so they can escape. A body washes ashore following the explosion and is presumed to be Sean. When it turns out to be Harry Thresher, Dex assures Alexis that no one could have survived the explosion. However, in episode 198, Dex goes to check on Alexis and finds Sean holding her at gunpoint. The men fight and grapple for the gun. A shot rings out! A horrified Alexis cries, ""Oh my God!""