Felix Leiter is a fictional character invented by Ian Fleming in the James Bond books, who also appears in the Bond movies. In the films, Leiter works for the CIA, and assists Bond in his various adventures, although in Licence to Kill, Leiter had transferred to the DEA. In the novels, Leiter initially works for the CIA, then later becomes a private detective after suffering a catastrophic injury.
The name "Felix" comes from the middle name of Fleming's friend Ivor Bryce, while the name "Leiter" was the surname of Fleming's friend Marion Oates Leiter Charles, then wife of Thomas Leiter.
Leiter also appeared in novels by continuation authors, as well as ten films and one television programme, Casino Royale, where the character became a British agent, Clarence Leiter, played by Michael Pate. In the Eon Productions series of films, Leiter has been portrayed by Jack Lord, Cec Linder, Rik Van Nutter, Norman Burton, David Hedison, John Terry and Jeffrey Wright; in the independent production Never Say Never Again, the part was played by Bernie Casey.