The Naked Runner is a 1967 British espionage film directed by Sidney J. Furie and starring Frank Sinatra, Peter Vaughan and Edward Fox.

Laker flies to Copenhagen and meets Anna, a British agent, who has booked a hotel room overlooking Frenzel's suite.

Jackson, another British agent, eventually arranges his release and Laker, still carrying a case with the gun inside, goes in search Frenzel.

Sinatra was in need of a hit—Marriage on the Rocks and Assault on a Queen having flopped in the two previous years—so he put actor and trusted aide Brad Dexter in charge of finding a suitable vehicle.

The title comes from a line in Arthur Symons' In the wood of Finvava—"A naked runner lost in a storm of spears"—that begins the book.

Dexter and Furie decided to take the maverick action of finishing the film with a stand-in (James Payne) for Sinatra's remaining scenes, editing in close-ups from earlier shots in post-production and overdubbing the dialogue.

Opening to mostly poor reviews on 19 July 1967, The Naked Runner was criticized for its slow pace, cinematography and plotting.

However, the reviews did not discourage the audience, who made the film Sinatra's first hit—albeit a minor one—since the great success of Von Ryan's Express two years earlier.