''K-9'' is a 1989 thriller-comedy film starring James Belushi and Mel Harris, and directed by Rod Daniel.

Michael Dooley (Belushi) as a problem: He's been tagged for execution by a major international drug dealer named Lyman. In order to help him put Lyman away for good and thereby save his bacon, Dooley's friend Brannigan (Ed O'Neill) gives him a drug-sniffing police dog named Jerry Lee (played by a real-life police dog named Koton), with whose aid Dooley attempts to put Lyman in prison for good. Now Dooley has another problem: Jerry Lee is a DeadpanSnarker with a mind of his own.

''K-9'' received mixed reviews and was followed by two direct-to-video sequels, ''K-911'' and ''K-9: P.I.''

Not to be confused with the occasional robotic companion of ''Series/DoctorWho'', nor with said tin dog's [[Series/{{K9}} eponymous spinoff series]].
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!!This movie provides examples of:
* DuelingMovies: Against ''Film/TurnerAndHooch''.
* GroinAttack: Threatened. Tough guys tend to get ''real'' chatty when they have their junk in a police dog's jaws.
* HeyItsThatGuy: [[Franchise/{{Emergency}} Paramedic Roy [=DeSoto=]]] is the BigBad.
* JerkassHasAPoint: When Dooley's girlfriend Tracey is kidnapped, the captain points out that it was Dooley's "seat of the pants bullshit" that got Tracey involved in the first place. At the very least, the stunts Dooley pulled to antagonize Lyman at every turn, such as holding him and his guests at gunpoint during a dinner party, didn't help.
* LifeImitatesArt: Towards the end of the movie, Jerry Lee is shot while apprehending a suspect in the attempted murder of a police officer. Two years after the film's release, Koton (who had returned to real police work after the movie) was shot and killed while apprehending a suspect in the attempted murder of a police officer.
* OpenHeartDentistry: Towards the end of the movie, Jerry Lee is shot, and Dooley takes him into a human emergency room for treatment. The surgeon initially refuses to operate, until Dooley threatens to shoot him if he doesn't.