"Tinker, Tenor, Doctor, Spy" is the 124th episode of the science fiction television series Star Trek: Voyager, the fourth episode of the sixth season. The title is a parody of the famous 1974 novel Tinker Tailor Soldier Spy by John le Carré. In this EMH-centric episode the fictional USS Voyager spacecraft, lost on the wrong side of the Galaxy has a run in with some mysterious aliens. The episode's story was written by the cartoonist Bill Vallely, and is noted for its comedic elements.