When the Brain sends villains after individual Titans, Cheshire is sent after Speedy. In the comics, Cheshire and Speedy had a daughter that Cheshire hid from Speedy for the first several years of the child's life.
In the comics, Jericho first appeared in "Tales of the Teen Titans" #42-44. As son of Slade Wilson, Joe Wilson was born with the mutant ability to possess people once he made eye contact. A childhood accident left his vocal chord severed - leaving young Joey unable to speak. The gentle mute hero known as Jericho joined the Titans despite his familial ties. When Beast Boy first meets Jericho, he is playing a guitar; In the comic book series, Jericho was an artist and musician.
This episode features the first full animated debuts of Argent, Pantha, Jericho, Bushido, Herald and Killowat; It also features the full animated debuts of Cheshire and Psimon.
Wonder Girl makes her second "unofficial" appearance on the animated series in another cameo. She is seen on the compass wheel. Wonder Girl, also known as Donna Troy, is Wonder Woman's younger sister. She first appeared - and joined the Teen Titans - in "Brave and the Bold" #60.
Psimon was originally slated to appear in the first season episode, The Sum of His Parts (2003), but the character in that episode was changed to an original one named Fixit.