I had to think about the Commando one for a min.
This might be really difficult..... let me know if it is and I'll go to something easier.
In Magnum P.I., what does the license plate read on Magnum's Ferrari?
Hint: If you watched the show enough, there were two other vehicles at the house he and Higgins stayed at. They all had the same license plate with one exception on all 3.