Magnum, P.I.1980

Magnum:
[narrating] When I write my book on how to be a world class private investigator, I'm going to include two rules on how to tail a car. The first is: when you choose a nondescript car for tailing, don't pick one so nondescript it's obvious. The guys following my new friend were so unnoticable it was like they had a red flag on the hood. The second rule is: don't get so busy tailing you forget to look behind you. These yo-yos had no idea I was behind them.