Continuity mistake: During the Puppet King's final rehearsal (just before the title sequence), the Raven puppet has a gem on its forehead, just like the real Raven. Later in the Titans Tower, however, the gem is no longer on this puppet.
Character mistake: When the Puppet King first prepares to incinerate the Titans, Starfire (in Raven's body) and Raven (in Starfire's body) watch from a catwalk above. We can hear Starfire gasp and Raven say "No"; but curiously they do so as if they were in their respective actual bodies (i.e. Starfire's body gasps and Raven's body says "No"), whereas for most of this episode each of the girls talk with her own voice in the wrong body.
Chosen answer: This is Dick Grayson who will later become Nightwing.
Greenman37