Our heroes foul up everybody's schedules trying to get free for a day of swordfish fishing.

Even for Toody, it was quite a foul-up.

....was the pilot episode, and the very first to be telecast in the series {September 17, 1961}.

:tv:

I am going to have to dispute, who's for swordfish was aired first, but was the 3rd episode filmed, Hank Garrett is in it as officer Nicholson and as per him is when he joined the cast. The pilot epsidoe was "Something Nice for Sol" Notice the patrol cars were mocked up with "54" on the doors taped on signs and the 2 cars that responded to the shoe store were actually much older cars - in fact cars from the TV show Naked City doing a guest appearance in the pilot. By the way both episodes masterpieces!