"The Ballad of Scary Mary" is the twelfth episode of Sym-Bionic Titan. It debuted on February 2, 2011.
Octus and Kimmy drag Ilana and Lance with them to an annual school event in the woods known as a "Scary Mary" party, named after a girl who supposedly died in those woods. Lance and Ilana are very reluctant to join in the fun, but after Ilana sees a geekish kid named Jason trying to open a pop bottle, she decides to go and talk to him. Lance does not feel the party vibe, so he chooses to hang out beside the van, until a Goth girl shows up and they begin talking. While Octus, Kimmy, and some of her friends start doing "The Robot," a shape shifting Mutraddi beast lands near the party. The shape shifter disguises itself as Jason and tries to kill Ilana, only to be stopped by Lance. When it shows its true form to the rest of the kids at the party, they all run, giving Lance, Ilana, and Octus time to form Sym-Bionic Titan and kill it.
Back in 1957, Mary attended Sherman High and was clearly seen as a nerdy unpopular girl. The day before the dance, she was asked out by a popular football player called Greg to go to the school ball. She was ecstatic, however he drives her to an abandoned farm rather than the school dance, where in the barn his friends cover her with mud and feathers, completely humiliating her. She fled and was recorded to have never been seen again.
Lance and Ilana are very reluctant to join in the fun but after Ilana sees a geekish kid named Jason trying to open a pop bottle she decides to go and talk to him, but Lance is still just not feeling the party vibe so he chooses to just hang out beside the van until a goth girl named Kristin shows up and they begin talking.
A little while Octus picks up a Mutraddi life form and the trio go to explore the woods but find an empty space ship pod. Assuming the Mutraddi died on impact they leave not wanting Kimmy and the others to see what they were investigating, however, the Mutraddi is far from dead. While Octus, Kimmy and some of her friends start doing "The Robot" the Mutraddi who surived the crash, who seems to be shape shifting beast called the Phantom Chameleon Monster, begins to blend into the group looking for the trio. The shape shifter disguises itself as Jason and tries to kill Ilana, only to be stopped by Lance. Realizing everyone is endanger if they keep the monster at the party they split, but they are not fast enough.
When it shows its true form to the rest of the kids at the party, the other sutdents all run giving Lance, Ilana, and Octus time to form Sym-Bionic Titan. They try to fight the monster but Octus finds it hard to hit the Mutraddi as it turns into Kimmy but after some reassurance from Lance & Ilana they get their act together and begin beating the Murtraddi and eventually kill it.
- In this episode, both Ilana and Lance gained potential love interests, being Jason and Kristin.
- Mary has a strong resemblance to Velma Dinkley of Scooby Doo fame.
- Features music by Hiss and Chambers.
- The Crüxshadow's song "Return (Coming Home)" plays during scenes with Lance and Kristin.
- We learn in this episode that the current year is 2007 or later, as the events of Mary took place in 1957 and both Kimmy & Brandon Chase say that was over 50 years ago.