Control Freak last appeared in "Episode 257-494". He makes note of this and is seen wearing a prisoner ID number that matches the episode number.
Control Freak's team roll call descriptions are taken right from the splash pages of "The New Teen Titans" comic book series from the 1980s: "Robin: Teen Wonder! Raven: Mistress of Magic! Beast Boy: Shape-Shifter Supreme! Cyborg: Half-Man, Half-Robot! Starfire: Alien Powerhouse!"
Control Freak interacts with Titans fans over the internet - which parodies fandom and many fan message board personalities: The Know-It-All Who Could Have Written It Better, The Fangirl Shipper, and the Kid Who Adds Superfluous Agreeable Post.
One of the message board users says that they think Starfire should be with Beast Boy. This could be a reference to Beast Boy's crush on Starfire in The New Teens Titans comics in the 80s.