The team questions the suspicious leader of a ministry after several of his followers are found murdered.
Morgan goes undercover in hopes of getting close to the killer - however, her mission takes an unexpected turn that puts her in great danger.
A third victim is found murdered in front of a live web cam.
The team agrees to meet with a reporter who will tag along with them as they attempt to solve an unusual case.
The team discovers that their serial killer's murder spree is inspired by "Dante's Inferno."
Season 4 begins with terrific back-to-back episodes involving serial killers ("Assume Nothing" / "For All Our Country").
Legendary Rock Band Black Sabbath appears on CSI: Wednesday night with a world premiere performance of their new song ...End Of The Beginning. Watch CSI: CRIME SCENE INVESTIGATION, Wednesday, May 15 (10:00-11:00 PM, ET/PT) on CBS!
A team of ghost hunters explore a haunted slaughterhouse in search of a murderer's spirit.
The team becomes suspicious when evidence points to an unknown male who was present at both the original and the recent murders.
The team ventures into the haunted slaughterhouse, where they find a murder weapon.
While discovering and eliminating the cause of the haunting - the team's work is interrupted with the discovery of another dead ghost hunter.
The manager of the haunted property talks to the team, after attempting to build a new life and silence the past at all costs.
Season 13 of the groundbreaking drama begins exactly where season 12 left off as Russell's granddaughter Kaitlyn has been kidnapped by someone working for incarcerated Jeffrey McKeen.
Russell confronts the self help-guru, who confesses his love for Mary and his involvement in the murder.
The team investigate possible suspects and conduct a few interviews that results in a breakdown that may reveal some interesting clues.