In an odd twist of fate that could not be appreciated for at a decade, Karl Malden plays a hotel thief who breaks into guest rooms and steals wallets; following one lowly heist that nets him him only a few dollars in actual cash, he bemoans that his livelihood is being snuffed out by rampant popularity of credit cards - which ironically later became his real-life late-career claim to fame as spokesman for American Express credit cards: "Don't leave home without it!"
Some early UK Pan film tie-in novels wrongly credited the boxer 'Archie Moore' as appearing in this film.