Jon Wellner Photo

Jon Wellner

Born: Jul 11, 1975

Birthplace: Evanston

Profession: Actor

Nationality: United States

Jon Wellner

Date of Birth : Jul 11, 1975
Birth Place : Evanston

Jon Wellner is an American actor, best known for his role as toxicologist Henry Andrews on CSI: Crime Scene Investigation. He has portrayed Andrews for eight seasons and has been signed for the 2013-2014 season, his ninth with the show. He began his affiliation with the show in Season 4 as a researcher, verifying that the information on the show was accurate. He had a role as a zookeeper in Season 5, then took on the role of Andrews. He continues to serve as a researcher for the show. In 2009 he and fellow cast member/researcher David Berman formed a company that does research for several other television forensics shows including Bones, CSI: Miami, and Drop Dead Diva.


  • Actor
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