Open Water is the twenty-second episode of Season 4 of CSI: Miami.
A cruise ship that is docked in Miami is the scene for a double murder. Firstly the team investigates the death of a man who was in the water eaten by sharks, they find out that it was the man's wife's daugther who stabbed him. Next they have to investigate the murder of a woman whose body was disposed of in the ships garbage room. They found out that it was the captin who strangled her with a binocular strap.
- Horatio and Marisol decide to get married to one another.