James Randi (1928-2020) was a stage magician and skeptic, who was known by his stage name "The Amazing Randi". He was a well-known challenger of paranormal claims and pseudoscience. Randi appeared in segments during the pilot Sesame Street Test Show 1, involving the letter D.
On television, Randi made 32 appearances for Johnny Carson on The Tonight Show. He has also appeared on Happy Days, Anderson Cooper 360, The Oprah Winfrey Show, Larry King Live, CBS This Morning, Today, The View and multiple appearances with Penn and Teller.