It's episode six, people, episode six. With Richard struck down by a tropical disease and Camille in Paris, it is left to Dwayne and Fidel to solve the murder of a local diver, Benjamin Lightfoot. After a night of heavy drinking with his brother, Mark, Benjamin is seen by his boss Phil Owen and Dwayne going diving the following morning. When Benjamin is still not back after a couple of hours, Mark raises the alarm with Phil - and helped by Phil's wife, Alex Owen, they search the water. Alex finds Benjamin's dead body in unusually shallow waters. This isn't the only thing that doesn't make sense, as Dwayne notices odd markings on Benjamin's chest. When he then tests Benjamin’s air gauge and discovers the tank is still full of air it's clear that it must be murder.