Click EasyEdit to add to this page. Original air date: September 18, 2006 Watch this episode on Innertube. Talk about this episode. Get full episode details at CBS.com.

(Antonio Riaz: Go home Caine) H: I will Antonio...once this is over

Eric and Horatio go to Brazil to find Marisol"s killer. Calleigh is in charge over in Miami. Horatio see's Yelina and see's Ray for one last time (alive)

Horatio Caine and Eric Delko arrive in Rio de Janeiro with revenge on their mind, intent on hunting down Antonio Riaz, the killer of Horatio's wife and Eric's sister, Marisol. Riaz haughtily taunts Horatio as he's released by Brazilian authorities who aren't convinced by the Miami DA's case against him. Horatio pays a visit to Yelina Salas, his brother Ray's wife, fearing that Ray is embroiled with the drug lord. His fears are confirmed, and worse, he learns his nephew, Ray Jr., might also be involved.

Calleigh is at charge back in the lab, and she and Dan Cooper identify a substance on Ray's shoe that leads Horatio and Delko into a rainforest in the heart of Rio. It's too late for Ray--he's found beaten and barely alive. Horatio stands by helplessly as his brother passes away, and he vows to protect his nephew. Yelina uses a GPS tracker on Ray Jr.'s watch to locate the boy, but he's with Riaz and the drug lord spirits him away before Horatio can stop him.

Back in Miami, Ryan reluctantly accompanies new CSI--and former mole--Natalia Boa Vista on a case. Fanny Silver lies dead in her house, and suspicion falls on her husband, Carl. Natalia assures Fanny's son, Scott, that the killer will be brought to justice. Scott is certain that Carl killed his mother, but the real culprit proves to be a painter who took Fanny's friendliness as flirting and assaulted her. Convinced Carl killed his mother, Scott fatally shoots him. Ryan is disgusted, convinced that Natalia is to blame for assuring the boy Carl would be punished. Calleigh is more forgiving, and even takes apart the boy's insanity plea.

When Horatio and Delko learn Ray Jr. and several other boys were spirited away by a woman, Horatio realizes his nephew is being used by Riaz as a drug mule. Yelina shows him latex gloves with the tips cut off in Ray's backpack, indicating he's carrying heroin pellets. Delko hunts Riaz down and takes him on. Just as it looks like the CSI is going to lose the fight, Horatio shows up and finishes Riaz, at last avenging Marisol's death.

Hoping to find Ray Jr. in Miami, Horatio and Delko return to their home base with Yelina. They soon find the woman, Anna, and one of the boys, dead in a warehouse. Anna tells them the boy started to get sick and she called a man to help. The man killed the boy and took the drugs he was carrying from his body. Epithelials from the phone the man abandoned lead the CSIs to Angel Delmonte, a known associate of Miami drug lord Diago Matos. Matos denies knowledge of the boys' whereabouts, but Horatio knows he's lying. Ray Jr. calls Yelina to tell her he's carrying the drugs to save his father, but he hangs up before she can tell him his father is dead. The other boy traveling with Ray Jr. turns up in the hospital, ill from the drugs in his body, and he gives up the location of Ray Jr. and Matos's scheduled meet. Horatio interrupts a tense showdown between the two. He gets Ray Jr. to drop his gun, but Matos fires off a shot and Horatio fires at him, killing the drug lord. Horatio reluctantly bids farewell to Yelina and Ray Jr., but not before reminding Yelina they have family in Miami.

Victim(s):Ray Caine, Riaz,

Suspect(s):

Whodunit: Riaz (he killed Ray Sr.), Horatio (killed Riaz for killing his brother and his wife, Marisol)

From the field:

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From the morgue:

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From the lab:

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Horatio faces Antonio Riaz and sees Yelina and sees his younger brother, Ray Sr., one last time... for good.

• Sofia Milos ~ Detective Yelina Salas
• Vincent Laresca ~ Antonio Riaz
• Carter Jenkins ~ Raymond Caine Jr.
• Giancarlo Esposito ~ Chief Braga
• Shawn Christian ~ Carl Silvers
• Alex Meneses ~ Ana
• Mason Gamble ~ Scott Satlin
• Luis Antonio Ramos ~ Tiago Matos
• Brendan Fehr ~ Dan Cooper
• Grant Sullivan ~ Painter
• Jeffrey Licon ~ Alcimar (as Jeff Licon)
• Ernesto Bautista ~ Angel Demorte
• Paul Beller ~ Police Officer
• Colleen McDermott ~ Pamela Silvers
• Brennan Mejia ~ Pablo