Sep 24, 2009
Sara Sidle (Jorja Fox) returns to help the team investigate when a famous young actress dies as the result of a suspicious car accident.
Oct 1, 2009
The team focuses its investigation on members of an upscale neighborhood when a porn producer and a drug dealer are killed.
Oct 8, 2009
The CSI team investigates when a mild-mannered support staffer kills a co-worker, but the motive for the murder is surprising.
Coup de Grace
Oct 15, 2009
When one policeman kills another, the CSIs must determine if the shooting was premeditated or an accident.
Oct 29, 2009
When a popular coach is found murdered in his home, an entire college football team is under suspicion.
Death and the Maiden
Nov 5, 2009
Two seemingly unrelated crimes tracked by the CSIs turn out to be connected by a twisted plot of revenge.
The Lost Girls
Nov 12, 2009
Langston's continued search for a young girl taken hostage as part of a human trafficking operation leads him to investigate a prostitution ring in Las Vegas.
Nov 19, 2009
An unusual piece of evidence revealed during a bowling tournament brings the CSIs to intestigate a murder at a bowling alley.
Dec 10, 2009
When Nick, Greg and Hodges take Henry to celebrate his birthday at a biker bar, they uncover a double homicide and find several suspects still at the bar who may be the murderers
Better Off Dead
Dec 17, 2009
A major shootout at a gun store may be connected to the death of a young woman involved in a suicide pact.
Sin City Blue
Jan 14, 2010
Two beautiful women are murdered in a Las Vegas hotel and the CSIs uncover an unusual killer during their investigation. Meanwhile, Langston continues to hunt "Dr. Jekyll."
Jan 21, 2010
The CSI team delves into the world of professional golf when the body of a legendary player is discovered during a high-profile tournament.
Feb 4, 2010
The case of two high school students, one dead and one missing, lead the CSIs into the underbelly of streetcar racing and a tangled web of deadly competition
Mar 4, 2010
Rascal Flatts takes center stage when a band member is electrocuted by his own guitar during a concert, the CSI team investigates if it was a case of foul play.
Mar 11, 2010
When a young boy is found murdered, the CSI team uncovers evidence that may link his death to an old case that recently resurfaced.
The Panty Sniffer
Apr 1, 2010
Catherine and Detective Vartann are thrown together in a hotel room for 24 hours as they stake out a duo making drugs in the room next door. Meanwhile, Nick and Langston work a case that involves a fetish which has become big business in Vegas.
Apr 8, 2010
When the CSI team investigates the brutal murder of a family, they trace the killer to the house next door, which might belong to the "Dr. Jekyll" serial killer.
Apr 15, 2010
When Hodges and Wendy take a group of high school CSI Explorer Scouts on a field trip, they embellish their role in solving cases and take their assignment a little bit too far.
Apr 22, 2010
When a student is discovered murdered at Lindsey's school, the investigation takes a sharp turn when the CSIs uncover an unlikely connection between the boy's death and atrocities of the past.
Take My Life, Please!
Apr 29, 2010
A legendary comic from the good old days of Las Vegas is set to reunite with his partner on stage for one night only, until one half of the famous duo is found dead.
Lost & Found
May 6, 2010
A mother thought to be grieving for the loss of her family three years ago becomes a suspect in a CSI investigation.
May 13, 2010
The CSI team must investigate one of their own when Langston is accused by a former colleague of being part of the Dr. Jekyll murders.