Season 4

Episode Guide

From the Grave

S4 E1
Sep 19, 2005
Horatio takes confession with a New York City Cardinal who is one of only a few people who know of the deadly crime he committed in his past. Meanwhile, Miami's fiercest gang seeks revenge on a rival gang member and opens fire at his mother's funeral. When the gang discovers that Horatio plans to find them and destroy their illegal smuggling operation, they put out a hit on Horatio.

Blood In Water

S4 E2
Sep 26, 2005
When a rich family is trapped on a burning yacht in shark-infested waters, the CSIs must investigate. The daughter is killed during the tragedy, and the team soon discovers a web of lies within the family. Now, as the team delves into the world of outrageously wealthy yacht club members, they find that not everyone is who they appear to be.


S4 E3
Oct 3, 2005
Sara Jennings was on her way to the Bahamas via Miami for a class trip when a wild night of partying, drinking and sex got out of control. Now, the CSIs must discover who she was with and what happened that night in order to find her. Meanwhile, Horatio's past in New York City resurfaces when an old unsolved case lands on his desk.

48 Hours to Life

S4 E4
Oct 10, 2005
After a young man confesses to murder and could fall victim to the county jail system, Horatio and the team must uncover the truth. Despite Tripp securing a written confession from Tobey Hollins, who admits to committing murder, the evidence tells Horatio that Tobey is innocent.


S4 E5
Oct 18, 2005
Three suburban housewives on a girls' weekend in Miami are the prime suspects when the hotel's handsome pool boy is found murdered. When Horatio is tipped off that his team is facing a surprise efficiency review, he must trust Calleigh, Delko and Ryan to work together to find the killer.

Under Suspicion

S4 E6
Oct 24, 2005
The CSIs must race against time when all evidence in a murder case points to Horatio. When the murdered woman is discovered, Horatio admits that he was seeing her and that he was the last person to see her alive. Although the evidence logically points to Horatio as the killer, our CSIs must now dig deeper to find the real killer and learn who would have the motive and the method to frame him.

Felony Flight

S4 E7
Nov 8, 2005
Henry Darius, a convicted serial killer, confesses to an unsolved murder and is flown from New York to Miami to show the police exactly where he buried the body. However, as the plane flies into Miami, it crashes and Darius escapes.


S4 E8
Nov 15, 2005
A woman who was just about to sign her divorce papers is found shot to death with a nail gun in her soon-to-be ex-husband's new home. Suspicion falls on her ex-husband and his new fiancée; however, when Ryan begins to follow the evidence, he is shot in the eye with a nail gun.

Urban Hellraisers

S4 E9
Nov 22, 2005
After Delko witnesses a bank robbery, the CSIs soon discover that the suspects are playing out the action from the videogame Urban Hellraisers on the streets of Miami. As they score points for each crime committed, the CSIs must discover what consists of getting to the next level in the game in order to stop the culprits before they strike again.


S4 E10
Nov 29, 2005
The team is stunned when Delko is busted for purchasing marijuana. However, as the truth as to why becomes clearer, Horatio must fight to keep Delko at CSI. Meanwhile, after a suspected drug lord is gunned down in his home, evidence leads the CSIs to a dirty bounty hunter whose greed may have gotten in the way of bringing a criminal to justice.


S4 E11
Dec 20, 2005
Natalia's mission to solve cold cases is a success when a man imprisoned for rape is set free six years later. However, when the CSIs reexamine the evidence, find the true culprit and go to arrest him, they find that someone else has already taken justice into their own hands and killed him.

The Score

S4 E12
Jan 10, 2006
A man is murdered while taking lessons from seasoned pros on how to score women in the competitive Miami night life. The CSIs, left only with a club full of likely suspects and a murder weapon wiped clean, must find the killer amongst the treacherous backdrop of Miami's sexual nightlife.


S4 E13
Jan 24, 2006
When a female executive is shot at an afternoon concert, the evidence leads the CSIs to suspect that the dreaded Mala Noche gang has struck again. Now, as the team gathers evidence, they must try to find the connection between the upper class victim and Miami's most dangerous criminal gang. Meanwhile, Wolfe starts to catch on to Delko and Natalia's off-duty relationship.

Fade Out

S4 E14
Jan 31, 2006
Evidence shows that a series of murders at Miami's hottest clubs are linked to organized crime, but also leads Horatio and the team to a pair of Miami film students whose screenplay mirrors the details of the crimes. Now the CSIs must track down anyone who had read their fictional script and wanted to turn it into a deadly reality.


S4 E15
Feb 7, 2006
When a body is uncovered during a beach volleyball tournament, the evidence leads Horatio to his nemesis, Walter Resden, who is now targeting one of his past victims. Horatio must deduce why Resden has returned and find a way to stop him for good. Meanwhile, Delko and Natalia's relationship takes an unexpected turn when she thinks that she may be pregnant.


S4 E16
Feb 28, 2006
Alexx comes under suspicion after a convicted child molester is found murdered in her neighborhood. Horatio finds DNA evidence that shows that Alexx was putting up posters in her neighborhood warning parents that a child molester was moving to the area.


S4 E17
Mar 7, 2006
A woman is killed from what seems to be a terrible auto accident. However, further evidence reveals that she was killed after the accident and a dead body is found in the trunk of the car. Now, as the investigation seems to be a case of a jewelry heist gone awry, the victim's traumatized son and Natalia's hidden past may hold the key to discovering what really happened.

Double Jeopardy

S4 E18
Mar 14, 2006
The Miami-Dade district attorney loses a highly publicized murder trial in which a husband is accused of killing his young bride and then dumping her body in the ocean. However, the woman's body is recovered from the ocean after the trial concludes and the 'double jeopardy' clause precludes the husband from being tried again.


S4 E19
Mar 21, 2006
After a group of wealthy women are robbed at a luxury day spa, evidence leads the the CSIs to believe that this is a part of a much larger car chopping scam and each of these women are being targeted for a home robbery. Matters become worse when Horatio discovers that Marisol was also at the spa during robbery and he must now protect her when her life is threatened.

Free Fall

S4 E20
Apr 11, 2006
The CSIs must find who is trying to kill a young, sexy couple just released from jail. Leo and Sienna's illegal activities transformed them from common criminals to media darlings, but now their past is catching up with them. However, after they are released from jail, their past misdeeds catch up with them.

Dead Air

S4 E21
Apr 25, 2006
When a kidnapped woman misdials a cell phone number and begs for help, the CSIs must find her before it's too late. Trying to determine the missing woman's location, the team must track down who she meant to call. Meanwhile, Horatio helps Marisol when she must make a difficult decision about the future. Also, Ryan gets Delko's permission to ask out Natalia, much to her surprise.

Open Water

S4 E22
May 2, 2006
When a cruise ship docked in Miami is the scene of a double homicide, the team must find the killer. The CSIs find that the long list of suspects includes a victim's wife who he met and married just seven days prior, her daughter, the ship's magician and the corrupt captain.


S4 E23
May 9, 2006
A spoiled heiress's red carpet rival, personal assistant and musician boyfriend are the prime suspects when she's found murdered. The victim is found dead in her bathtub during her own star-studded party, and the CSIs have their work cut out for them when each of the A-list suspects has a motive to kill her.


S4 E24
May 16, 2006
Just as Horatio and Marisol begin their new life together as husband and wife, the Mala Noche gang trial is disrupted when a witness helps the defendant escape during his own testimony. Now free and running from the law, the criminal orders Horatio's death, but ends up shooting someone very close to Horatio instead. Meanwhile, a jilted lover from Delko's past wreaks havoc with anyone close to him.

One of Our Own

S4 E25
May 23, 2006
Horatio and Delko search Miami to bring down the Mala Noche gang once and for all after the murder of someone very close to them. However, their quest is jeopardized when the Feds seize the CSI lab with the intent to close it for good, based on the tip from the mole inside. When the mole is finally revealed to the entire lab, the news sends the remaining CSIs reeling.