Continuity: Robin is chasing Red X. Red X throws a net of some kind onto Robin, then Robin says, "I'm fine. Get X. Go." and points toward Red X. Later, we find out that this was actually a hologram of Robin, when Starfire accidentally activates it again. However, this time, the hologram of Robin does not point after his dialogue.
Great sites
Quotes
Raven: Last year, my friends got me a cake and some balloons.
[Kids listen intently.]
Raven: But I couldn't enjoy it because my dad Trigon, the scary red demon with horns, took over the world, and there was fire everywhere and then some guy named Slade with a skeleton for a face came after me and ...
[Kids whimper in fear.]
Raven: ... My friends saved me and we all ate cake. The end.
Mistakes
Pantha, mistaking Cyborg for a competitor, grabs him, lifts him over her head and begins spinning him. In the shot where she is briefly seen from above, she uses only one hand, but before and after that she uses both hands to whirl him around. See more...
Trivia
While the Titans fight their own evil sides summoned by Trigon, the evil Cyborg taunts the good Cyborg about having no mother. As a matter of fact, in the mainstream comic series Cyborg's mother died because of a botched experiment by his father, which summoned an interdimensional monster. It was also on that day that Cyborg received his cybernetic prosthetics due to injuries the monster had inflicted on him. See more...
Teen Titans mistakes
Continuity: 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.
Continuity: When Starfire is force-fed pie by Mother May-Eye, she swallows a rough clump of pie before pretending to be mind-controlled. But after may-Eye leaves, her tongue evicts a whole pie from her mouth, plate and all.
Teen Titans trivia
X-X "The Lost Episode": Character cameos: In the concerto audience you can find Mad Mod, Slade's former butler and the former HIVE headmistress. Also, the conductor appears to be Mumbo in his non-sorcerous form ("The Sum Of His Parts").
Cyborg's meeting with the boy with the hand prosthesis is a subtle hint on how Cy from the comic series would first meet the most important woman in his life: Sarah Simms.
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.
Teen Titans quotes
Beast Boy: Is it me, or are we getting our butts kicked?
Robin and Raven: It's just you!
Raven: Evil beware. We have waffles.
Raven: I'd really rather just stay here and drown.
Teen Titans easter eggs
In the Special Features section of the third season's DVD, you can find a comment on why there are an English and a Japanese version of the title song, together with a medley with both versions alternating along with scenes from the season's episode. In order to find it, you have to go onto Mas' symbol on his chest.