Jon Wellner

Born July 11, 1975, Jon Wellner is an American actor who appeared in the dual roles as Bob Denver and Gilligan in the 2001 CBS docudrama movie Surviving Gilligan's Island. Not much of his early career is known, but Jon is perhaps best known for his role as toxicologist Henry Andrews on "CSI: Crime Scene Investigation." He portrayed Andrews for eight seasons and has been signed for the 2013 to 2014 season, his ninth season with the show. Jon 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."