Peppard played Thomas Banacek, a suave, Polish-American freelance investigator based in Boston, who solved seemingly impossible thefts (see locked room mystery). He then collected from the insurance companies 10% of the insured value of the recovered property. One of Banacek's verbal signatures was the quotation of strangely worded yet curiously cogent "Polish" proverbs. -- WikiPedia
When a professional football player vanishes from the field of play in front of a large crowd and millions of TV viewers, Banacek is called in by the owner of the team to solve the mystery.
A $5,000,000 experimental car, and the train car it was being transported on, both disappear without a trace.
A priceless gold cross disappears en route from Mexico to Los Angeles, despite being guarded by an army officer and handcuffed to a priest.
A million dollars in cash disappears from a Las Vegas casino's tamperproof display case.
Banacek must discover how a coin collector's priceless collection is stolen from a locked vault inside a state-of-the-art secure hotel room.
Banacek must solve a murder and the disappearance of a valuable book from a theft-proof display case.
Banacek must figure out how $23 million worth of paintings vanished from a sealed truck on its way from New York to Boston.
Banacek is hired to retrieve valuable stock certificates stolen from a major food company on the eve of a planned merger.