Other mistake: When the probes are going off in the Titans, including Robin, Slade rips off his arm piece that houses the red button. When he does this, the probes stop. However, it would have required clicking the button again rather than just breaking it off the rest of his suit. (00:19:45)
Final Exam - S1-E1
Continuity mistake: After the Titans are evicted from their home and grieve over their loss, before Robin re-enters, as the Titans are gazing at the ocean, Cyborg's arms are attached to him, despite having lost his right one, which is still in Gizmo's possession.
Chosen answer: This is Dick Grayson who will later become Nightwing.
Greenman37