There's only four Season 3 episodes in which Olmec has his golden glow: The Comet-Embroidered Battle Flag of William the Conqueror, The Much-Heralded Helmet of Sir Gawain, The War Fan of the 47 Ronin, and The Bifocal Monocle of One-Eyed Jack.
These were the first four episodes of Season 3, but the idea of the golden glow was scrapped and he went back to his orange glow for the rest of the season.