Dr. Steven Greer is the founder of The Disclosure Project. Dr. Greer also runs CSETI (Center for the Study of Extraterrestrial Intelligence) whose goal is to initiate contact with extraterrestrials. Dr. Steven Greer, Brian Redban - Date: 03/03/2013
Worth a listen if you're into aliens and UFOs, but Greer is probably the most obnoxious humble-bragger to have ever existed. His claims are (fairly) challenged by Rogan and when he's in a corner, he usually says "I can't disclose that" or dances around the challenge.