The Andy Griffith Show

Big Fish in a Small Town (7x11)

:

When Howard goes fishing with Andy, Opie, Goober, and Floyd, he catches the legandary rare carp "Old Sam". After he decides to put the legendary fish in a Raleigh museum, Howard learns a lesson from Opie that "Old Sam" is such an important part of the town's history that he brings the fish back to lakes surrounding Mayberry.