Wednesdays 10:00 PM on CBS
Csi

Watch CSI Season 11 full episodes online, free and paid options via our partners and affiliates.

CSI Season 11 Finale Pic
Watch CSI Season 11 Episode 22
"In a Dark, Dark House"
Original Air Date:

After years of pursuit and a countless number of murders, Langston comes face-to-face with serial killer Nate Haskell inside the house where his killing spree began, on the eleventh season finale.

CSI Turns 250
Watch CSI Season 11 Episode 21
"Cello and Goodbye"
Original Air Date:

This is the 250th episode of CSI. In it, Langston becomes more determined than ever to track down Nake Haskell.

Disturbing Return
Watch CSI Season 11 Episode 20
"Father of the Bride"
Original Air Date:

Nate Haskell, the notorious "Dick & Jane" killer, resurfaces when he e-mails a disturbing video to the father of one of his brides, threatening to take her life.

Return of Lady Heather
Watch CSI Season 11 Episode 19
"Unleashed"
Original Air Date:

It's the return of Melinda Clarke. This actress reprises her role of Lady Heather on this CSI episode.

Shot of Langston
Watch CSI Season 11 Episode 18
"Hitting for the Cycle"
Original Air Date:

A string of death takes over CSI this week. Has the team run across the cycle of homicide, a suicide, an accidental and a natural death all in one night?

The List Scene
Watch CSI Season 11 Episode 17
"The List"
Original Air Date:

An ex-cop is murdered in prison this week. The CSI team looks into the case and stumbles upon an interesting clue.

From Turn On, Tune In, Drop Dead
Watch CSI Season 11 Episode 16
"Turn On, Tune In, Drop Dead"
Original Air Date:

Zombie alert! Zombie alert! On this episode of CSI, two men initially pronounced dead somehow come back to life.

Back on CSI
Watch CSI Season 11 Episode 15
"Targets of Obsessions"
Original Air Date:

Justin Bieber is back for this episode of CSI. His character, a troubled teen, interacts with Nick.

Tracee Ellis Ross on CSI
Watch CSI Season 11 Episode 14
"All That Cremains"
Original Air Date:

Langston's wife pays a surprise visit to CSI this week. The character is played by Tracee Ellis Ross.

Marlee Matlin on CSI
Watch CSI Season 11 Episode 13
"The Two Mrs. Grissoms"
Original Air Date:

Marlee Matlin guest stars this week as Grissom's ex, while Phyllis Frelich comes on board as his mother. The episode's investigation centers on the death of the director of a scholarship foundation.

Dita Von Teese on CSI
Watch CSI Season 11 Episode 12
"A Kiss Before Frying"
Original Air Date:

Dita Von Teese makes her first appearance on CSI this week. She plays a school teacher and forensics enthusiast who gets asked out by Nick.

Carot Top on CSI
Watch CSI Season 11 Episode 11
"Man Up"
Original Air Date:

Carot Top guest starred on the first CSI episode of 2011. Read on for a detailed rundown of "Man Up."

Catherine and Nick
Watch CSI Season 11 Episode 10
"418/427"
Original Air Date:

The team sets out to track down a pedophile this week. The man is suspected of killing a FBI agent's wife and also of kidnapping his children.

Sara and Greg
Watch CSI Season 11 Episode 9
"Wild Life"
Original Air Date:

The unit attempts to determine whether or not a man's fall off a balcony was suicide or murder. Such a question makes for an interesting case on "Wild Life."

Reed, Langston and Stokes
Watch CSI Season 11 Episode 8
"Fracked"
Original Air Date:

Detective Reed joins Langston and Stokes this week as they investigate the murder of two men. The victims were set to accuse a company of poisoning the drinking water of a farming town.

Nick Investigates
Watch CSI Season 11 Episode 7
"Bump and Grind"
Original Air Date:

The team discovers shredded remains of a man this week. As a result, members find themselves with various suspects and must determine the true culprit.

As Frankie Reed
Watch CSI Season 11 Episode 6
"Cold-Blooded"
Original Air Date:

Welcome to CSI, Katee Sackhoff! That actress debuted this week as a new detective, Frankie Reed. She assists the CSI team.

So Much Hoarding
Watch CSI Season 11 Episode 5
"House of Hoarders"
Original Air Date:

The CSI team looks into a murder at the home of Marta, someone considered a "level 5 hoarder" on this episode. Her house contains more than just possessions: there's more than one corpse.

Ann-Margaret on CSI
Watch CSI Season 11 Episode 4
"Sqweegel"
Original Air Date:

Ann-Margaret guest stars on this episode of CSI. She plays a Vegas icon who is targeted by a serial killer.

Getting Sexy and Serious
Watch CSI Season 11 Episode 3
"Blood Moon"
Original Air Date:

CSI joins in on the vampire craze this week. On the episode "Blood Moon," major violence breaks out during a convention.

Catherine and Sara
Watch CSI Season 11 Episode 2
"Pool Shark"
Original Air Date:

Catherine and Sara look into the death of a woman killed in a Las Vegas pool on this episode. Read on for a detailed recap of where things go from there.

As Jason McCann
Watch CSI Season 11 Episode 1
"Shock Waves"
Original Air Date:

Justin Bieber helped welcome fans to season 11 of CSI. He guest-starred on this episode, which we've provided a full recap of.