Wealthy couple Jonathan and Jennifer Hart, a self-made millionaire and his journalist wife, moonlight as amateur detectives. They travel the world, enjoying luxury living and solving crimes along the way. With the help of loyal butler Max and their beloved pet dog Friedwart, they take on cases involving smuggling, espionage, murder, and more. Their opulent Bel Air estate serves as their base of operations, where they entertain guests and solve mysteries with style and romance.

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Some TV shows that have similar genres and were produced around the same time as Hart to Hart include Scorpion, Vikings, Warrior, NCIS: Los Angeles, 9-1-1: Lone Star, Person of Interest.