John Martin is a government agent working under cover. Leading citizen Morgan calls in gunman Galt who blows Martin's cover.
John Wayne, Lucile Browne, George 'Gabby' Hayes, LeRoy Mason, Lloyd Ingraham, Jay Wilsey, Frank Ball, Bert Dillard, Lafe McKee, Eddie Parker, Herman Hack

To take down South Boston's Irish Mafia, the police send in one of their own to infiltrate the underworld, not realizing the syndicate has done likewise. While an undercover cop curries favor with the mob kingpin, a career criminal rises through the police ranks. But both sides soon discover there's a mole among them.
2006

A case involving drug lords and murder in South Florida takes a personal turn for undercover detectives Sonny Crockett and Ricardo Tubbs. Unorthodox Crockett gets involved romantically with the Chinese-Cuban wife of a trafficker of arms and drugs, while Tubbs deals with an assault on those he loves.
2006

It's a major double-cross when former police officer Brian O'Conner teams up with his ex-con buddy Roman Pearce to transport a shipment of "dirty" money for shady Miami-based import-export dealer Carter Verone. But the guys are actually working with undercover agent Monica Fuentes to bring Verone down.
2003

Kay and Jay reunite to provide our best, last and only line of defense against a sinister seductress who levels the toughest challenge yet to the MIB's untarnished mission statement – protecting Earth from the scum of the universe. It's been four years since the alien-seeking agents averted an intergalactic disaster of epic proportions. Now it's a race against the clock as Jay must convince Kay – who not only has absolutely no memory of his time spent with the MIB, but is also the only living person left with the expertise to save the galaxy – to reunite with the MIB before the earth submits to ultimate destruction.
2002

When a virus leaks from a top-secret facility, turning all resident researchers into ravenous zombies and their lab animals into mutated hounds from hell, the government sends in an elite military task force to contain the outbreak.
2002

After a police chase with an otherworldly being, a New York City cop is recruited as an agent in a top-secret organization established to monitor and police alien activity on Earth: the Men in Black. Agent K and new recruit Agent J find themselves in the middle of a deadly plot by an intergalactic terrorist who has arrived on Earth to assassinate two ambassadors from opposing galaxies.
1997

Axel Foley returns to the land of sunshine and palm trees to investigate the near-fatal shooting of police Captain Andrew Bogomil. With the help of Sgt. Taggart and Det. Rosewood, they soon uncover that the shooting is associated with a series of "alphabet" robberies masterminded by a heartless weapons kingpin—and the chase is on.
1987

Fast-talking, quick-thinking Detroit street cop Axel Foley has bent more than a few rules and regs in his time, but when his best friend is murdered, he heads to sunny Beverly Hills to work the case like only he can.
1984

The new warden of a small prison farm in Arkansas tries to clean it up of corruption after initially posing as an inmate.
1980

In this prospective pilot, Mick Jade, a tennis bum-turned-Las Vegas-song-and-dance man, doubles as a private eye with two female dancers, Ebony and Ivory. The trio go undercover to protect a lady scientist from international hitmen as she heads for Washington D.C. from the near-East with her super-secret formula.
1979

Zachary Hallock and his son Joshua are farmers who live in a frontier town that suffers the assaults of a band of outlaws. After the murder of a Pinkerton's detective, the farmers decide to unite against the bandits, but Hallock rejects the proposal. To the astonishment of his son and his fiancée, Hallock decides to join the outlaws.
1953

Major Lex Kearney, dishonourably discharged from the army for cowardice in battle, volunteers to go undercover to try to prevent raids against shipments of horses desperately needed for the Union war effort. Falling in with the gang of jayhawkers and Confederate soldiers who have been conducting the raids, he gradually gains their trust and is put in a position where he can discover who has been giving them secret information revealing the routes of the horse shipments.
1952

Johnny Mack Brown and Raymond Hatton return to the screen as saddle pals Nevada and Sandy in Monogram's Pals of the Border. In this one, our heroes are US marshals, hot on the trail of cattle rustlers.
1944

Summarily accused of murder, drifters Duke (Foran), Pancho (Carrillo) and Andy (Devine) are tossed into the hoosegow, only to be released when their alibi checks out. Far from offended by his ill treatment, Duke agrees to take the job of sheriff, retaining Pancho and Andy as his deputies. The gruesome threesome then sets about to solve a series of mysterious Wells Fargo robberies
1941

A reporter goes undercover to break up an outlaw gang.
1940

Hoppy goes undercover as a gambler from the East when Bar 20 cattle are stolen by unknown rustlers. Brennan/Talbot are twin brothers (one a casino owner, the other a rancher) and Hoppy believes they provide alibis for each other while one is out committing crimes. Hoppy gets a job in the casino to learn more but is exposed when a gambling gunslinger notices him.
1939

Cowboy star Ken Maynard is Jim "Trigger" Morton, in town undercover while pursuing the man who framed him for robbery. But a well-placed shot tames a band of scofflaws and gains Morton the sheriff's badge. Now, he's riding on both sides of the law. The line is further blurred when old buddy Chuck offers evidence of Morton's innocence in exchange for a blind eye to Chuck's impending postal heist in this classic Western.
1938

Tex Weaver is working under cover to bring in a gang of bank robbers. When he is killed, Tim Ross, a marksman with Doc Shaw's traveling show, takes over. Posing as a Mexican he lays a trap for the gang.
1936

Bill Tracy is a Cattleman's Protective Association agent. Working undercover on his way to Sonora, a town dominated by rustlers, saves Betty Carter from a situation, but her rancher father, believing Blackie's suggestion that Bill is a rustler, forbids her to see him. Bill and his pal Heinie Schmaltz rescue each other from rustlers' various plots and ambushes and eventually discover that Blackie, Carter's foreman, is the leader of the rustlers.
1930

The earliest surviving film featuring Lon Chaney in a major role, By the Sun's Ray's was but one of several 2-reel westerns starring the florid Murdock MacQuarrie. MacQuarrie plays a detective investigating a series of gold shipment robberies. Along the way, he falls for a mine superintendent's pretty daughter (Agnes Vernon), much to the dismay of a sullen mine office clerk (Chaney), who is also smitten with the girl...
1914