User blog comment:4evermerlin/Merlin air date/@comment-24.15.24.155-20120723020013

The trend seems to be that Merlin will air on BBC between Sept and Dec, then it will come to the USA on SyFy around early to mid January. Usually SyFy has Merlin marathons right before the air the new series/season (using that depending on how you view it and where you're from).