Thomas John Flanagan, known professionally as Thomas John, is an American psychic medium. He first started working professionally as a medium in his mid-20s, and has worked in New York City and Los Angeles. John starred in the 2018 reality TV show, Seatbelt Psychic, and CBS All Access series The Thomas John Experience beginning in June 2020. John has been the subject of significant criticism, including his use of information acquired online during group readings.