The ‘CSI’ Cast, Then & Now (PHOTOS)

William Petersen, CSI, CSI: Vegas
CBS, Sonja Flemming/CBS ©2021 CBS Broadcasting, Inc

After two decades and three spinoffs, the CSI franchise is back to where it all began in Sin City for CBS series CSI: Vegas — and with a second season! Even better, after original CSI: Crime Scene Investigation stars William Petersen and Jorja Fox starred in the first season, Marg Helgenberger returned for the second.

“She’s wiser and more mature. But she still has that intensity and fortitude and stamina and doggedness in regard to solving a crime — especially if it’s something that touches her deeply,” Helgenberger told TV Insider of Catherine Willows now. “That would never change, I don’t think, as long as she has her wits about her and her physical strength.”

With the return of CSI: Vegas for its second season, we’re checking in with CSI’s Season 1 stars and two later recruits who also returned for the new series.

CSI: Vegas, Thursdays, 10/9c, CBS

William Petersen as CSI supervisor Gil Grissom on CSI

William Petersen Then

For eight and a half seasons, Peterson was a full-time CSI star, playing CSI supervisor Gil Grissom.

William Petersen, CSI: Vegas
Sonja Flemming/CBS ©2021 CBS Broadcasting, Inc

William Petersen Now

After CSI and before CSI: Vegas, Petersen’s only big onscreen role was his role as Col. Emmett Darrow in the WGN America series Manhattan.

Marg Helgenberger as Catherine Willows on CSI

Marg Helgenberger Then

Helgenberger spent 11 and a half seasons on CSI, with her character, Catherine Willows, taking over Grissom’s supervisor post after his exit.

Marg Helgenberger as Judge Lisa Benner in the CBS drama All Rise

Marg Helgenberger Now

In between her stints in the CSI world, Helgenberger starred as Judge Lisa Benner in the CBS drama All Rise, as seen above.

Jorja Fox, CSI

Jorja Fox Then

Fox starred in almost every CSI season, playing forensic scientist Sara Sidle, a CSI team member who strikes up a romance with Grissom.

Jorja Fox, CSI: Vegas
Sonja Flemming/CBS ©2021 CBS Broadcasting, Inc.

Jorja Fox Now

Like Peterson, Fox has mostly stayed out of the spotlight between CSI stints, aside from her roles in the 2019 film 3022 and this year’s film The Map of Tiny Perfect Things.

Gary Dourdan in CSI

Gary Dourdan Then

As audio-visual specialist Warrick Brown, Dourdan starred in CSI’s first eight seasons. His character died in the Season 9 premiere.

Gary Dourdan in Redemption Day
Saban Films

Gary Dourdan Now

Dourdan returned to the spotlight in 2021 as the lead star of the film Redemption Day, seen here.

George Eads, CSI

George Eads Then

For 15 seasons, Eads starred on CSI as Nick Stokes, the crime lab’s resident hair and fiber expert.

George Eads, This Is Us

George Eads Now

Eads starred as Jack Dalton in the CBS drama MacGyver. He also guest-starred as a football coach in NBC’s This Is Us, seen here.

Paul Guilfoyle, CSI

Paul Guilfoyle Then

Guilfoyle starred as homicide detective captain Jim Brass for 14 seasons, and he and Helgenberger both returned for CSI’s 2015 series finale.

Paul Guilfoyle, CSI: Vegas
Sonja Flemming/CBS ©2021 CBS Broadcasting, Inc.

Paul Guilfoyle Now

The actor, who returned as a guest star in CSI: Vegas Season 1, had big roles in USA’s Colony and drama spinoff The Good Fight in recent years.

Wallace Langham, CSI

Wallace Langham Then

Recurring since Season 3 as lab technician David Hodges, Langham finally became a series regular in Season 8.

Wallace Langham, Young Sheldon
Erik Voake/CBS ©2018 CBS Broadcasting, Inc.

Wallace Langham Now

Langham returned for CSI: Vegas Season 1. His other roles of late include parts on CBS sitcom Mom, For All Mankind, and Young Sheldon (seen here).