If Vandal Savage gatecrashing the Team Arrow/Team Flash love-in wasnt enough, it wouldnt be long before Malcolm Merlyn and his League of Assassins turned up unannounced at the Arrowcave. What was most WTF about this random arrival was just how Merlyn and his large group of Assassins managed to casually and covertly sneak their way in to surprise our heroes. In fact, in a later scene Barry even calls the group out on this, and rightly so. Clearly Theas daddy dearest is against using conventional doors.