Bonanza enlisted well-liked actor Guy Williams to play the part of "Will Cartwright,"
the nephew of "Ben" (Lorne Green) in season 5. But he was actually brought in to fill the void left
by the looming exit of "Adam Cartwright," as star Pernell Roberts planned to quit the show come season 6.
Guy Williams
His daughter, Toni Catalano, worked briefly as an actress in the 1980's. She later
worked a production coordinator on the TV show Unplugged.