While Calder returns to the States, Annie and Auggie focus on making Henry pay for his misdeeds and bringing him to justice.
Following a lead on Henry, Annie, Auggie and Calder travel to Hong Kong without CIA sanction. Joan and Arthur discover a traitor.
Annie heads to New York with new intel on Henry. Joan finds a solid lead from FBI Agent Rossabi as Arthur’s court date nears.
Annie is separated completely from the CIA and all her support systems as she starts a deep undercover operation totally on her own. Annie is determined to bring Henry to justice in a way that vindicates Arthur. But Annie's "death" leaves Auggie, Joan and Arthur to deal with the consequences.moreless
Annie must dodge attackers while making a last desperate effort to take down Henry and finds herself facing off with Calder.
New information sends Annie to Copenhagen to prevent Teo's latest mission. Calder's allegiances become known to Auggie. Top defense attorney, Bianca Manning, is hired by Arthur to save the Campbell name.
Joan and Calder clash over Annie's meeting with known terrorist Teo. Annie tries to convince Teo to turn against one of his own people as part of the plan to bring down Wilcox. Auggie is in some serious trouble.moreless
Annie teams up with a seasoned operative to hunt for the five stolen missile launchers and she's prepared to play hardball. Back home, Auggie deals with past demons while Calder is even more suspicious of Annie.moreless
Annie insinuates herself into the FBI's investigation of Seth's death. When FBI Agent Vincent Rossabi tells her that traces of skin were found under Seth's nails, Annie has only a small amount of time to cover her tracks. Henry offers Annie the opportunity of a lifetime.moreless
Calder makes himself Annie's handler and sends her to Vienna to seek out a Greek arms dealer. Calder forbids any communication between Annie and Auggie while she's on her mission. Arthur and Joan discuss how Calder is probably Henry's new mole inside and how they can get out in front of Henry's game.moreless
Annie and Auggie find that their new romance is straining their work relationship. Arthur and Henry have a serious disagreement. Teo and Auggie are hiding information from Annie.
Annie heads to Colombia to figure out Teo's true allegiances. A series of interviews could determine Joan's future at the CIA.
After a major eye-opener at the CIA, Auggie and Arthur try to work out Henry's next move. Joan confides in Annie.
Annie builds her new relationship with Wilcox while getting used to her new romance with Auggie. Annie and Auggie head to Colombia where they meet up with CIA station chief Calder and later with rebel leader Teo.moreless
A group of protesters breaks into the NYPD precinct after the police are suspected of killing an unarmed man. Mac and Flack find themselves caught up in the chaos as the team makes a fast move to try and solve the case. On the personal side, Mac contemplates his future with Christine.moreless
At Valentine's Day the CSIs get a taste of both the sweetest and the sourest that life can offer as they work on three twisted tales of love gone wrong.
A couple of graffiti artists, who vandalize their district using the tag 'Murderer', will find their sign a very close reality when a body is dumped at their feet.
The CSIs lead an investigation after the body of a masked man found at the bottom of a notorious skyscraper adds to the mysterious count of deaths that form part of the history of the building. Meanwhile, Jo runs into a stranger with an unexpected link to her past while enjoying a day off.moreless
The CSIs with the always difficult task of working a case where an officer has been shot: talking to the family, processing the scene and getting to the bottom of the truth. The case is particularly hard on Lindsay who has strong and fond memories of the victim.moreless
Two men are found dead with a common feature: both have been killed using unconventional methods. Meanwhile, $1 million anonymous checks are left around the city by someone known as the Guardian Angel.moreless
The co-owner of a popular bar is found dead. Meanwhile, Adam is forced to come to terms with his past so he can look ahead.
Detective Lovato's past as an undercover officer tangles up with her present duty when one of the gang members she ingratiated herself in and developed feelings for turns up tortured and killed.
The murder of a man named Luke leads the CSI team into the world of performance enhancement drugs; Lindsay is forced to revisit a hurtful past upon returning to Montana to witness the execution of Daniel Katums.moreless
The CSIs realize that the latest bodies discovered answer to some psychopath reenacting the game of CLUE in real life.
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