Trivia: The warehouse in which the Titans combat the new Red X is actually the same warehouse which housed the disco party in "Sisters", right down to the SOTO (after series co-director Alex Soto) neon sign.
Trivia: When Robin and Red X jump to the attack against Dr. Chang's henchmen, a white dove passes across the screen. The white dove passing by is the trademark of film director John Woo, stemming from an idea he had for his film The Killer.
Trivia: One of Beast Boy's possible choices for Red X's identity is "part of a clone army". If you stop at the right time, you can indeed see Robin wearing a Star Wars clone trooper armor suit (sans helmet).
Trivia: Red X pulls on Robin's mask, which pulls the flesh and skin around his eyes along with it as if it was glued on, and lets it snap back into place. In the comics, Dick Grayson (at least as Nightwing) indeed uses an adhesive named spirit gum to keep the mask on his face.
When Raven telekinetically reassembles the broken chime bead necklace, it has about nine beads and is rather tight, but before and after that the necklaces feature about 13 or 14 beads and are wide enough to fit around the others' necks.