U.S. TV host Craig Ferguson has invited a number of celebrity guests to give his robot sidekick Geoff Peterson a voice while his regular controller, actor Josh Thompson, is on vacation. British actors Alfred Molina and Dominic Monaghan were among those who had the honour on shows this week (begs07Nov11), while Bad Santa star Lauren Graham and The Office actress Angela Kinsey will be among those taking over the post next week (begs14Nov11).