When an old friend of Alex' is murdered, he and his father investigate.
Ten Tons of Trouble
Alexander gets a call about a missing 10-ton statue, a priceless artwork whose whereabouts has the authorities baffled. The statue called the Vigil of the Shepherds was exhibited at a Manhattan Museum.
Knave of Diamonds, Ace of Hearts
Leonard finds himself facing a murder charge after pulling a job Alexander turned down. The elderly Blacke accepted to test a new security system at a jeweler’s and ended up accused of murder when a corpse turns up inside a vault. This predictable episode involves a planned jewel heist, father-son rivalry and bungling police work. Alex is coerced into solving the mystery of what happened to Czar Nicholas' diamonds and who killed the jeweler.
Revenge of the Esperanza
Leonard is in Florida to raise money for a brother and sister who think they know the location of a sunken treasure. The Blackes take off to Florida where sightings of a ghost ship have been reported by deep-sea divers.
Death Goes to the Movies
While working as a consultant for a movie, Alex gets an added responsibility when the producer is murdered in an editing room.
Leonard takes Alex to the town where he met Alex's mother, but there is a problem: the town's population vanishes overnight. A corpse and the site where a man was murdered seem to vanish without leaving a trace. After seeing strange lights in the sky, the Blackes have reason to suspect that aliens might have abducted a woman.
Prisoner of Paradise
Alex has been asked by the Justice Department to help them with the extradition of Victor Kroeger, a man who pulled a scam that netted him 122 million dollars, and has been on the run for 18 years, and who has been caught in the small country of San Marcos. It seems that Kroeger has been caught before and always manages to escape. Agent Harrison was the one who handled the extradition in Honduras five years ago, and it seems his superiors want Alex to help. Alex accepts. Leonard upon hearing of this decides to go with him in hopes of getting the money. Alex, Leonard, and Agent Harrison are met by Captain Gondolpho, who apprehended Kroeger. They also run into two of Kroeger former associates, Stuart and Rhodes who both think that they sent each other a telegram asking the other to met them there. But it appears that Kroeger was the one who sent it. They also run into a photo journalist Leslie Davis, who wants to cover the story but Gondolpho is not sure if he should allow her.
Alex comes to the aid of his former assistant, Louise Richmond, whose husband has blown the whistle on a conspiracy between his company and the Government. When Alex suspects General Wersching (J.D. Cannon) is accepting bribes from a corporation doing business with the government, he enlists Wersching's assistant, Major Crawford (Nancy Grahn) to help him uncover the truth.
A plane with no one aboard lands near a ghost town that Leonard recently won in a poker game.
Last Flight to Moscow
Alex is enlisted to help a diplomat's wife defect from the Soviet embassy.
A Friendly Game of Showdown
Leonard and Alex (Hal Linden) hatch a scam to rescue an old friend's toy company after a rival steals his revolutionary robot prototype.
It's a Jungle Out There
Alex and Leonard come to aid of a U.S. diplomat who is being blackmailed by a crooked Monte Carlo casino owner involve in selling technological secrets.
A Poe manuscript is apparently purloined from Alex's apartment during an auction that leaves two participants breathing nevermore