|Writer||Anthony E. Zuiker|
|Original Airdate||19 April, 2004]]|
The Oath is the twentieth episode of Season 2 of CSI: Miami.
A police officer collapses and dies after pulling over a car with the investigation revealing that he was murdered. Horatio grows suspicious when Internal Affairs gets involved, leading him to believe that the killing wasn't a random crime. Meanwhile, Calleigh aids an abused woman who's living with one of the suspects. Yelina begins dating Horatio's nemesis, Rick Stetler who also happens to be heading up the IA enquiry.
- Beat cop Officer Aaron Jessop is introduced for the first time.