Percy is told Oizys is the goddess of failure. The Roman name for Oizys was Miseria, which is the root of the word misery.
This episode covers the events of chapters 5 through 8,and a portion of chapter 9, from the Lightning Thief book
The title of this episode comes from chapter 6 of the book the series is based on.
While filming the fight between Percy and the Aries campers during capture the flag, Walker Scobell (percy) had apparently become so good at swordfighting, in preparation for the role, that he had to hold back while filming on order to look more like someone that didn't have a clue about what they where doing.