Peter Lassally, who became known as the “host whisperer” for guiding some of late-night’s biggest stars, has died at 93. Lassally, a Holocaust survivor, worked with Johnny Carson on The Tonight Show, David Letterman on Late Show, and Craig Ferguson on The Late Late Show. He died Sunday of natural causes at a memory care facility in Los Angeles, his son, Tom Lassally, told The Hollywood Reporter. He also became executive producer of The Late Late Show with Tom Snyder until 1999 and mentored Jon Stewart. He came out of retirement in 2004 to oversee The Late Late Show with Ferguson.