Josh Robert Thompson was the voice - and puppetmaster - behind Geoff Peterson on The Late Late Show with Craig Ferguson for nearly 5 years. He provided hundreds of character voices and impressions and often took off the guests, Morgan Freeman and Matthew McConaughey among them. A consummate impressionist, Josh's Goldblum, De Niro, Arnie and Freeman are immaculate. He articulates his technique and the vagaries of showbiz in this highly entertaining hour.