Continuity mistake: Más y Menos figure out how to use Professor Chang's Cryogenic Machine to unfreeze their fellow Titans and do the reverse with the opposition. But the few times where they are seen actually activating the Freeze option - Professor Chang and his assistants, and later the HIVE Five -, they push a different button in each instance.
Plot hole: Speedy's bow got cut up by Cheshire in the previous episode ("Calling All Titans"), and in the Brotherhood base he is seen frozen with empty hands raised. But when he is unfrozen in this episode (zoom in to check), he suddenly does hold a new bow in his hands.
Chosen answer: This is Dick Grayson who will later become Nightwing.
Greenman37