|Original Airdate||18 Sep. 2006|
|Previous Episode: One of Our Own|
|Next Episode: Going Under|
Rio is the first episode of season 5 of CSI: Miami.
Horatio and Delko travel to Rio to find Riaz, the man responsible for Marisol's murder. While there, Horatio meets Yelina and learns that his brother is back doing undercover work and may be connected to Riaz, for whom Horatio also suspects his nephew is working. Back in Miami, Natalia, now a CSI, helps Ryan investigate the beating death of a woman in Coral Gables.
|This section is a stub and requires expanding|
- David Caruso as Horatio Caine
- Emily Procter as Calleigh Duquesne
- Adam Rodríguez as Eric Delko
- Khandi Alexander as Alexx Woods
- Jonathan Togo as Ryan Wolfe
- Rex Linn as Frank Tripp
- Eva LaRue as Natalia Boa Vista
Guest Cast Edit
- Sofia Milos as Yelina Salas
- Christopher Stapleton as Raymond Caine
- Vincent Laresca as Antonio Riaz
- Brendan Fehr as Dan Cooper
- Carter Jenkins as Raymond Caine Jr
- It's revealed that Natalia is now an official CSI.
- With Horatio out of the country, Calleigh is temporarily promoted to the rank of Lt. and as such becomes the head of the Miami-Dade Crime Lab.
- Horatio eventually learns from Yelina that Ray Jr might be working for the drug lord now.
- Raymond is eventually discovered in a slum, bleeding and eventually dies from his wounds, his last words being to Horatio whom he urges to save his son, Ray Jr.
- Horatio and Delko eventually succeed in avenging Marisol's death by killing Antonio Riaz.
- Rex Linn (Frank Tripp) and Eva LaRue (Natalia Boa Vista) are promoted to series regulars and as such, are now part of the opening credits.