Episode 9
Appendicitement
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.
The CSI team unravels a string of complex murders while racing to identify a serial killer whose diabolical medical skills confound the experts.
October 1, 2009
The son of a notorious killer is arrested on suspicion of murder, and the CSI team must overcome their natural prejudices against the boy's antecedents in order to track the true culprit.
Episode 3
Working Stiffs
October 8, 2009
The team investigates the murder of Jason, a troubled computer geek working at a low-level casino support industry job who lures a colleague, Paulie, into a dangerous plan to make a working stiff's dream come true.
Episode 4
Coup de Grace
October 15, 2009
When a policeman kills another officer, the CSIs must look to the evidence to determine if the shooting was premeditated or an accident.
Episode 5
Bloodsport
October 29, 2009
After a beloved college football coach is found dead and his house drenched and spattered with his blood, the CSI team hunts for the killer who didn't find Coach Jimmy lovable at all.
Episode 6
Death and the Maiden
November 5, 2009
When two seemingly different crimes turn out to be related, the CSIs discover they're interlocking parts of the same revenge plot.
Episode 7
The Lost Girls (III)
November 12, 2009
The CSI team helps Ray Langston investigate a prostitution ring that may have harbored a hostage he has been looking for in Miami and New York. The crossover starts on CSI: Miami S08E07 Bone Voyage (I) and CSI: New York S06E07 Hammer Down (II).
Episode 8
Lover's Lanes
November 19, 2009
A bowling tournament is disrupted when an important piece of evidence is uncovered, leading the CSIs to investigate a murder at the same bowling alley.
Episode 9
Appendicitement
December 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.
Episode 10
Better Off Dead
December 17, 2009
The CSIs dig to find the truth about how a recent shootout at a gun store might connect to a young woman who may have committed suicide.
Episode 11
Sin City Blue
January 14, 2010
Two secretaries on holiday from Arizona attempt to steal a man's wallet and ATM pin number in a scam, and wind up dead in different locations. Meanwhile, the CSI team also investigates a disturbing medical mystery involving the dumping of human organs in a wildlife refuge.
Episode 12
Long Ball
January 21, 2010
The CSI investigates the mystifying death of a former pro golfer whose allegiance to the game might have cost him everything.
Episode 13
Internal Combustion
February 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.
Episode 14
Unshockable
March 4, 2010
When a band member of Rascal Flatts is electrocuted by his own guitar during a concert, the CSI team investigates if it was a case of foul play.
Episode 15
Neverland
March 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.
Episode 16
The Panty Sniffer
April 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.
Episode 17
Irradiator
April 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.
Episode 18
Field Mice
April 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.
Episode 19
World's End
April 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.
Episode 20
Take My Life, Please!
April 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.
Episode 21
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.
Episode 22
Doctor Who
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, on part one of a two-part season finale of CSI.
Episode 23
Meat Jekyll
May 20, 2010
The CSI's lives are on the line as they close in on the elusive Dr. Jekyll, and more than one member of the team may not live to see his capture, on part two of a two-part 10th season finale of CSI.
