S1·E12 Girl in the Galleon

A diver discovers five boxes of gold coins in a shipwreck while on a dive for a museum. He goes to ask for a percentage of the find. The next day he turns up dead, an apparant drowning victim. Sandy thinks it was murder, so he enlists Ken to find out what happened and if it is related to a woman the diver reported seeing in the sunken ship the day before his death.