NBC (ended 1987)
Did you know that the final episode wasn't necessarily intended to be the final episode? Clues are on Murdock's T-shirts during the last shows.
Granted, it seems as though many strings were left untied at the series' end. I do believe that it was the producers' intention to do so, for whatever creative reason -- comeback? Reunion?
The show is what it is, though, and that's a damn good one. Enjoy all the episodes.
The show was on before my time, but from what I've seen I have always felt that the series should have ended with the guys performing one final mission and finally receiving their pardon from President Reagan. Since he was an actor, maybe he could have made a cameo.
And the last line should have been Hannibal: "I love it when a plan comes together."