Vegas

The show's actual name is "Vega$" which can't be used as an article name directly.

Vega$ was the story of Las Vegas private investigator Dan Tana (Robert Urich) who went around solving various crimes. He drives around in a classic car and has a secretary that probably has a bit of a crush on him.

Tropes used:
 * Speak Now or Forever Hold Your Peace: Dan tries to stop his secretary from marrying a man who is only doing so in order to raid the trust fund for her son, which he will do by killing her and her son after they're married, a particular practice he did at least once before.