i recently saw a post theorising Merlin as Morgie's father and i just adore it. I can't remember the at so if anybody can find it let me know.
But I am a huge fan of Merlin/Morgana's relationship in BBC's Merlin. Now don't get me wrong i don't see Merlin/Morganna as endgame but i do adore the idea that they had a short lives relationship/ one night stand that resulted in Morgie.
I imagine that it is a well-kept secret and very few people know of Morgie's true origins. I imagine Morgie always knowing and Merlin letting Morgie and by extension his friends (when morgie is in involved) get away with things. I imagine Merlin and Morgana both tutoring Morgie at magic putting him well above most of the class.
I love all the scenarios that can come from Merlin being Morgie's father. Imagine if Morgie was the son of the world's most renowned and powerful wizard and his biggest rival.