Mayday is a 2005 American made-for-television thriller film based on the 1979 novel by American author Thomas Block. The novel was updated in 1998 by authors Thomas Block and Nelson DeMille and re-released as a paperback. The film was directed by T. J. Scott and stars Aidan Quinn, Gail O'Grady, Dean Cain, Charles Dutton, Michael Murphy and Kelly Hu. It aired on CBS in the United States on October 2, 2005.