The recurring theme of 'reflections' in Season 2's Terra arc continues in this episode when Robin forces Terra to look at herself. Another theme is Terra's hair falling to one side in her apprentice costume, giving her a visual similarity to Slade.
In the New Teen Titans comics, Terra also had a special hatred for Raven - whose powers threatened to expose Terra's duplicity. In turn, Raven was extremely distrustful of Terra. Terra attacked Raven and gloated over her fallen body, similar to their battle in this episode.
Based loosely on "The Judas Contract", the landmark Teen Titans story arc that, among other things, featured the origin of Deathstroke/Slade, the first appearance of Dick Grayson in his Nightwing identity, and the addition of Joseph Wilson/Jericho to the team.
In the comics, Terra betrayed the team in the classic "Judas Contract" story in "Tales of the Teen Titans" #42-44 and Annual #3; Initially joining the team in "The New Teen Titans" (vol. 1) #30, Terra was actually a spy for Deathstroke [Slade] from the very beginning. She and Slade used the Titans secrets and weaknesses against them to bring them down one by one. In the comic story, Robin was the last Titan to be brought down by Slade and Terra.
In the comics, Changeling [Beast Boy] was also disbelieving when confronted with Terra's betrayal. He initially blamed Deathstroke [Slade] before realizing Terra made many decisions of her own accord. There were brief times when it seemed Terra was confused; She would become enraged when the Titans reached out to help her.