The 10th season concludes with Horatio investigating one of his own CSIs after one of Miami's biggest enemies is murdered.
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Horatio uncovers a corruption scandal that pits him against an old adversary. Meanwhile, Calleigh makes a life-altering decision that could affect her relationship with Delko.
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At Risk
Season 10, Episode 17
Calleigh discovers a personal connection to a case in which a beloved tennis coach is nearly killed.
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The "Miami Taunter" kills again, and Horatio visits the matriarch (Raquel Welch) of the suspected killer's family.
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A neighborhood do-gooder is murdered and the investigation reveals that the victim was about to blow the whistle on something big.
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Last Straw
Season 10, Episode 14
Miami sorority sisters are murdered one-by-one, and the CSIs try to stop the killing spree. One death occurs at a horse stable, and the owner's daughter may know something about the crime.
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A skydiver is murdered and the investigation reveals the victim has more than 100 children and all of them are suspects.
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An eccentric genius is assassinated with an unusual weapon.
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Crowned
Season 10, Episode 11
The CSIs uncover the seedy side of child beauty pageants when they investigate the murder of a contestant's mother.
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Long Gone
Season 10, Episode 10
A family of three vanish from their suburban home without a trace and no ransom demands are made. The investigation reveals the husband is unemployed and may be involved in selling drugs.
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The CSIs investigate when three convicted murderers are released from prison and someone starts killing them one by one.
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A serial killer known as the Miami Taunter, who removes victims' eyes, seems to have struck again when a woman's body is found on a beach, but the chief suspect in the case has an airtight alibi.
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A masked assassin disrupts a high-stakes poker game and kills one of the players. Drea de Matteo guest stars.
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A maid with vampire bites on her neck is found hanging from a chandelier in an empty mansion on a remote island. The investigation reveals all of her blood has been drained.
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Horatio protects a Mexican police chief from a mysterious assassin who killed her husband.
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The CSIs hunt for a serial killer who takes women's eyes as part of his sadistic ritual. Meanwhile, a new nemesis (Carlos Bernard) challenges Horatio.
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Blown Away
Season 10, Episode 3
Ryan and Walter investigate a young woman's murder, but a tornado suddenly touches down and destroys the crime scene. It also carries the victim's body away and seriously injures Ryan.
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Stiff
Season 10, Episode 2
The CSIs investigate the murder of a gigolo who was killed with an unusual weapon.
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The 10th season begins with Horatio bleeding from a gunshot wound and Natalia battling to free herself from the trunk of a submerged car, as the other CSIs try to capture an escaped murderer before he kills again.
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