User blog comment:Dryuuu/Mordred questions in Series 5/@comment-3325613-20120428124026/@comment-4650675-20120428141202

I think that Mordred's eyes do glow!

The reasons they did not back on 2x11 when he was using telepathy was simply because...he had his eyes closed while moving those lances. At least that's my guess!

Whenever Merlin uses serious magic, his eyes do not glow gold. When Merlin mastered the powers over life and death or when he made that huge typhoon, his eyes did not glow. Same with Morgause, when she created a column of fire her eyes did not change colour.