STAGE TUBE: Sneak Peek - Marg Helgenberger's Final Episode of CSI, Airing 1/25

After 12 years of starring on the CBS drama series CSI, actress Marg Helgenberger will make her final appearance on the January 25th episode entitled "Willows In The Wind". In the episode, Helgenberger's character Catherine Willows makes a life-changing decision to leave the CSI team. The show airs from 10:00-11:00 PM, ET/PT and will include guest stars Matt Lauria as FBI Agent Pratt, Titus Welliver as CEO Mark Gabriel and Annabeth Gish, as his wife, Laura Gabriel.

CSI: CRIME SCENE INVESTIGATION is a fast-paced drama about a team of forensic investigators trained to solve crimes by examining the evidence. They are on the case 24/7, scouring the scene, collecting irrefutable evidence and finding the missing pieces that will solve the mystery. D.B. Russell, the new CSI Supervisor for the grave shift, comes to the team after heading the Seattle Crime Lab. He's a family man and scientist, but not a nerd. Son of hippie parents, he's a left-coast Sherlock Holmes who devours crime novels and looks at every crime scene as if it were a story waiting to be told.

The team's other members include Catherine Willows, the team's former supervisor and an investigator with a cop's instinct for reading human behavior; Nick Stokes, the conscience of the team, often driven by his emotional connection to the victim to always get the job done; Sara Sidle, aka Mrs. Grissom, relentless in her pursuit of criminals and the moral compass of the team; Greg Sanders, once an off-beat tech analyst and now an experienced and intuitive crime-solver; and Morgan Brody, an exile from the Los Angeles Crime Lab and the daughter of Undersheriff Ecklie. She's a natural-born investigator who still has a lot to learn about politics and family. The CSI team members also work closely with Captain Jim Brass, a seasoned detective and protector of CSI, sometimes to a fault; Dr. Albert Robbins, the ever-professional medical examiner; his wise-cracking assistant, David Phillips; and David Hodges, a tech of many talents who often rubs people the wrong way, but never fails to deliver.

CSI: CRIME SCENE INVESTIGATION airs Wednesdays at 10:00 pm/ET on the CBS network.

To get a sneak peek at Marg Helgenberger's final episode, click below!