Dave is temporarily reactivated into the military as a training officer. Intelligence has an enemy agent under surveillance and knows that her contact is in the unit Dave is training, but they don't know who the spy is. Dave must discover who the spy is to prevent his unit's ordered simulated attack on a nuclear power facility from becoming real.

A woman, who identifies herself as a ""boring stenographer on vacation"", shows up at the houseboat with three thugs after her. After Sandy and Ken fend off the men, Sandy takes the woman for a drink -- and she promptly disappears on him. He's out to find out where the ""boring stenographer"" went and why men were tailing her.

A woman is on the run with $20,000 that was intended as a bribe. She hires Ken as a bodyguard to accompany her back to her hometown, unaware that the brother of the man the bribe is intended to free is on their tail.

Ken is paid $2000 to meet a business executive in Fort Lauderdale. En route he is kidnapped by men posing as police officers. He escapes and arrives at the hotel to meet the businessman, discovering someone else posing as Ken Madison has already contacted the businessman.

Dave Thorne runs into an old girlfriend who turns out to be involved in a marital triangle that leads to attempted murder.

While preparing to leave a tiny hotel Ken finds a young woman passed out in the hall outside his room. He revives her and discovers she is carrying $45,000 ransom money for her abducted boyfriend. Ken, against his better judgment, decides to help her ""negotiate"" with the kidnappers because she is $5,000 short of their ransom demand -- and she keeps fainting.

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A hated dictator, living in exile in Miami, is murdered during a birthday party for his son. Lt. Snedigar thinks he has an open-and-shut case against Pepe the Clown, who performed at the birthday party, but Pepe insists he was not at the party. Dave has to prove to the skeptical policeman someone else went to the party in Pepe's costume.

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When Daphne is kidnapped on the way to a friend's wedding in Nassau, Sandy discovers the truth about the prospective groom.

When Daphne falls in love with a mysterious young nomad, the detectives are suspicious of his past.

An ex-con moves to Miami from New York with his muscle man. No one believes he's gone straight, especially when a yacht club commodore turns up dead after denying him access to the yacht club.

A former USO singer who knew Dave in Korea is trying to make a name for herself. To help, she gets a ""gimmick"" - $130,000 worth of jewelry to attract publicity. The ""gimmick"" indeed attracts publicity -- thieves, who rob the nightclub during the show.

A wealthy businessman hires Ken to look after his wild daughter. The girl is enamored with an ex-con who owes a crime boss $25,000. When the man turns up dead, she confesses to his murder.

Sandy is hired to find an old acquaintance, the director of a lingere show. He encounters a number of romantic double-crosses. One member of the show entourage turns up dead, an apparent suicide, but Sandy thinks otherwise.

A woman, having an affair, turns up dead after her lover attempts to blackmail her. The woman's husband, who suspected the affair, is the prime suspect, and asks Dave to find the truth.

A Treasury Department engraver retiree disappears from Bass Creek on his honeymoon. A federal agent thinks he's being forced to work with conterfeiters so she hires Ken, who vacations frequently at Bass Creek. When they arrive, posing as newlyweds, Ken discovers that his old friends have been replaced by new, unfriendly owners.

Dave Thorne tries to defend Sandy, who is facing a murder charge after slugging a drunken attacker who was found dead only minutes later.

Not realizing that he is being taken by a conman, Garibaldi Dinato pays a year's rent up front to lease the Surfside 6 houseboat as a new location for his Italian restaurant.

A woman from South Carolina shows up at the office while Ken's trying to go fishing and asks him to find the boyfriend that jilted her. Initially reluctant, Ken takes the job and discovers that her ex-boyfriend has mob ties. Meanwhile, Daphne and Cha Cha attempt to improve her wardrobe in case Ken finds her boyfriend, and Lt. Plehn is trying to establish a case on a murdered mobster.

An insurance company hires the boys to find the beneficiary of a life insurance policy named Nicole Johnson. Things get complicated when the boys find three Nicole Johnsons.

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A drug store delivery boy borrows a formal jacket from Sandy for a prom. As he leaves the houseboat he is shot. Sandy thinks it was a case of mistaken identity and the bullets were meant for him.