Spy Hunt, also known as Panther's Moon, is a 1950 American espionage film noir, based on the novel Panther's Moon by Victor Canning, directed by George Sherman, and starring Howard Duff and Märta Torén.

In Milan, Catherine Uilven, an agent for the legitimate democratic government of an unnamed Central European country, conceals top secret microfilm in the collar of one of two circus panthers that are being transported by train to be taken to America.

Steve Quain, an American stranded in Europe without money, has taken the job of accompanying the panthers so he can get back to America.

Unaware of the microfilm, but attracted to Uilven whom he meets briefly when she poses as a reporter, he is in the final car of the freight train with the panthers when saboteurs, in the pay of the usurping government, detach it from the train in Switzerland.

Quain awakens from concussion in a small mountain hotel run by a non-practicing doctor, Dr Stahl.