Kenneth Tigar has had a diverse career lasting more than three decades, starting with appearances in such television series as "The Waltons," "Police Woman," and "The Rockford Files. " For the most part, his work during the '70s consisted of single-episode roles, but he also had recurring parts in "The New Adventures of Wonder Woman" and "Man From Atlantis." He continued to act in television shows and movies during the '80s. Among his credits this decade were such comedies as "WKRP in Cincinnati," "Bosom Buddies," and "One Day at a Time"; action shows such as "Knight Rider," "Simon & Simon," and "Hart to Hart"; the evening soaps "Dallas" and "Dynasty"; and dramas "Hill Street Blues" and "Lou Grant," among many others. The '80s brought the recurring part of Sid Sidlevich on the hit comedy "Growing Pains," but by this time Tigar also began appearing in films such as "18 Again!" and "Lethal Weapon 2." His career stayed television-heavy over the next two decades, encompassing series for broadcast and cable networks, although during this span Tigar made his documentary acting debut portraying William Jennings Bryan for "The American Experience."