Dr. Matthew "Matt" Camden, the eldest son and child of the Camden family, on the WB Television Network show 7th Heaven from 1996-2002 (seasons 1-6). Barry Watson returned as Matt in three episodes of season 7, five episodes of season 8, ten episodes of season 9 (was considered a semi-regular cast member that year), and two episodes of season 10. Watson left the show when he was diagnosed with Hodgkin's lymphoma, although he made the decision to leave in late 2001 - months prior to the diagnosis.