Have Gun, Will Travel

Jonah (5x37)

Air date: May 26, 1962

$20,000 in gold bullion is stolen and dropped into a lake. Paladin decides to try to retrieve it but Jonah, a fisherman, has the spot staked out. He's after a huge trout and doesn't want anyone getting in his way. There's also the three thieves watching and waiting to ambush Paladin once he gets the gold.