The Secret Ways is a 1961 American neo noir mystery thriller film based on Alistair MacLean's 1959 novel The Last Frontier. It was directed by Phil Karlson and stars Richard Widmark.

Alistair Stuart MacLean was a Scottish novelist who wrote popular thrillers and adventure stories. Many of his novels have been adapted to film, most notably The Guns of Navarone (1957) and Ice Station Zebra (1963). In the late 1960s, encouraged by film producer Elliott Kastner, MacLean began to write original screenplays, concurrently with an accompanying novel. The most successful was the first of these, the 1968 film Where Eagles Dare, which was also a bestselling novel. MacLean also published two novels under the pseudonym Ian Stuart. His books are estimated to have sold over 150 million copies, making him one of the best-selling fiction authors of all time.