User blog comment:Rassilon of Old/Ep. 124 "Performance" discussion/@comment-4823177-20120407182209/@comment-4584676-20120407193043

Mr. Haly knows. Wasn't it him who hired Batman and Robin to do the mission knowing that Robin was Dick? Also, he mention that he can always tell a Grayson when he's in action or flying (somethign like that), so if he were to see video of Robin crime fighting, Mr. Haly would recognize the moves as a Grayson.