CSI: Crime Scene Investigation

William Petersen

William Petersen has a distinguished background in film, theatre and television, and played the role of Gil Grissom for nine seasons.

William Petersen

Plays Gil Grissom

Seasons 1 - 9

William Petersen has a distinguished background in film, theatre and television. He also serves as executive producer on CSI and in 2003 was nominated for a Golden Globe Award for his portrayal of Gil Grissom.

Petersen's television credits include Long Gone, The Rat Pack, The Beast and the Golden Globe Award-winning mini-series The Kennedys of Massachusetts.

Petersen's film roles include To Live and Die in LA, Manhunter, Cousins, Young Guns II, Fear, The Contender, and the films Hard Promises and Keep the Change - both of which he also produced.

In 1979, Petersen founded the Remains Theater Ensemble in Chicago with a group of fellow actors. In 1983, he starred as Jack Henry Abbott in In the Belly of the Beast, which he performed at the Wisdom Bridge Theatre in Chicago, at the Edinburgh Festival and at the Kennedy Center for the Performing Arts in Washington DC.

In 1996, Petersen made his Broadway debut in a revival of Tennessee Williams' The Night of the Iguana. He has also appeared in a number of regional stage productions, including A Dublin Carol, A Streetcar Named Desire, The Time of Your Life, Glengarry Glen Ross, Fool for Love and Speed-the-Plow.

Comments (11)

  • Glinda

    1 year ago


    No Gil no CSI

  • suzanne devine

    over 1 year ago

    suzanne devine

    william can you please come back and work with ted danson even if it is for one episode i miss you playing grissom please come back

  • Kaye

    almost 2 years ago


    Didn't think I'd like Danson, but he improved as the series went on, but Dear Mr Peterson, please come back... put your head round the door, even. Call it continuity

  • amy jordan

    2 years ago

    amy jordan

    hiya lool xx i luv yuu babii ruthy xxxxx

  • John|Deegan

    2 years ago


    Come on Gill pease come back just for 1 episode you are CSI its not the same without ye. England loves you

  • Mim

    over 2 years ago


    I miss Griss!

  • Stefan

    over 2 years ago


    Really awesome guy..You really make more wanna watch more and more..Thanks

  • aimmee

    over 2 years ago


    CSI is just not the same without Grissom . I miss him so much. He has a lovely way about him and I think he's even more gorgeous now that he's got older. Please, please come back!!

  • Costas

    almost 3 years ago


    He's not just the best actor when he was younger was on of the best looking actors too. He had a nice body

  • tashaa

    3 years ago


    gissom is without a doubt THE best actor in csi vegas, he brought such charichter to the show and the fact that the other actors are livivg up to that high standard shows the amazing effect he had on his 'team'

  • sue

    3 years ago


    hi csi isent the same since grissom left i still like it any way i have heard that grissom is coming back into csi for 1 episode i hope you come back let me know please if it is true i cant wait to see you in that episode