"Missing Richard Simmons" focuses on the sudden retirement from public life of Richard Simmons. After having an illustrious media career spanning over 30 years and known for interacting with fans on a personal level, Simmons retired from the public eye in February 2014. Not only did he no longer appear in the media, but he also stopped teaching his regular exercise classes at Slimmons and stopped corresponding with his friends and fans. Former producer on "The Daily Show" Dan Taberski sets out to find out why.