Arthurian legend has long inspired romantic stories, and there many books and movies devoted to the King Arthur/Guienevere/Lancelot love triangle. But the TV series Merlin's most popular 'ship among the fanbase turned out to be that of Arthur/Merlin, and it's easy to see why—their chemistry, the banter between them, those hurt-comfort scenes, the trust they have in each other...that's what made the show. And while their friendship remained platonic in canon (Merlin concluded its run in December 2012 in the U.K. after 5 seasons), there are many, many fanworks (which you can find at fandom-friendly places like Archive of Our Own, YouTube, and Tumblr) dedicated to romantic feelings between the two. In short, they definitely deserve their own Shipping Sunday.
Are you a fan of the show? Did you enjoy the relationship between Arthur and Merlin, whether or not you 'shipped them? More pictures always welcome in the comments!