Several days after one of his company's dams burst, ruining the life savings of several investors, a shady power company president is found stabbed to death. Ellery Queen gets to the bottom of the mystery.

George Sanders makes his final appearance as crook-turned-detective Simon Templar, a.k.a. "The Saint," in The Saint in Palm Springs. The gimmick in this one is a set of rare stamps, smuggled from England. Wendy Barrie is the true heir to this treasure, and the Saint is engaged to protect her and the stamps. Our hero meets Barrie in a posh Palm Springs resort, where a gang of homicidal thieves have converged to relieve the girl of her inheritance. Three murders and one kidnapping attempt later, the villains are foiled by the Saint, with the aid of his onetime partner in crime Pearly Gates (Paul Guilfoyle). The Saint in Palm Springs is the sixth in RKO's series of films based on the character created by Leslie Charteris.

Newlyweds Dennis and Carmelita have several obstacles to deal with in their new marriage: Carmelita's fiery Latin temper, a meddling aunt and a conniving ex-fiancee who's determined to break up their marriage.

Roy Rogers takes on crooked wartime profiteers in the musical western Ridin' Down the Canyon. Posing as solid citizens, the crooks spend their evening hours stealing horses from local ranchers, then selling the steeds to the government at exorbitant prices. The head of the bad guys runs a dude ranch where Rogers and his pals (The Sons of the Pioneers) are employed.

To get the three needed business men to visit the Stevens mine, Roy stages a ride with the Vacaros and has them as honored guests. Seeing a chance to make a lot of money, gangster Harmon joins the ride and then has his men kidnap the three. Having filmed a fake holdup earlier, he uses the film to convince the Sheriff that Roy and the boys were the Kidnapers.

A New York City newspaper is sued for libel after reporting the wrong verdict in a murder trial.

Carmelita Fuentes is a fiery-Latin singer/dancer in Mexico City who has designs on Dennis Lindsay, an American publicity agent, for unclear reasons, while Lindsay's shiftless uncle Matthew Lindsay aids and abets her every step of the way to the marriage altar.

Dennis heads west to work on an important business deal minus the Mexican Spitfire, Carmelita. His hot-tempered spouse decides to surprise him, but ends up as the surprised one when she sees him with another woman. Instead of a second honeymoon, Carmelita begins divorce proceedings

American Steve Kendall, a freighter's radio officer, discovers seaman Carlson sending an unauthorized message ashore as the ship approaches his war-poised homeland. Carlson is shot in cold blood when he jumps ship and Kendall, implicated in the espionage, swims ashore to avoid arrest. A woman he meets at the dock hides him in her apartment, where he learns Carlson was her brother, and they both work in a sabotage ring. Nedra is a singer at Tio's Cafe, and she approaches Tio for help when both the saboteurs and the secret police try to capture Steve.

Jed Marlowe is a brilliant, scheming, unscrupulous criminal lawyer whose specialty is defending criminal he knows is guilty but gets them off through loop-holes or bribery. Then his daughter, misled by her father’s courtroom performance, but unaware of his back-room tactics, marries the killer her father has just unjustly save from the electric chair. What’s a poor father to do?