David Letterman and Robert Downey Jr. talk to lamas in 'My Next Guest Needs No Introduction' trailer
David Letterman sets Lizzo, Kim Kardashian for My Next Guest season 3
All four episodes of season 3 will premiere on Netflix this Oct. 21.
Howard Stern on the time Donald Trump allegedly rated Angelina Jolie and Ivanka's looks
Stern is the next guest on David Letterman's 'My Next Guest Needs No Introduction'