Raven and Starfire participate in a roller derby.
Tropes:
- Double-Meaning Title: A "jam" is what a roller derby round is called, and the Titans team is also based on the food, with Raven being called the "Grapes of Azaroth".
- Go-Karting with Bowser: The other members of Starfire and Raven's derby team are Harley Quinn, Poison Ivy, and Catwoman. Even after the villains trick the Titans into helping them rob a bank and Raven & Starfire catch up to and arrest them, they all promise to reform the derby team once they're out of prison.
- Team Pet: Lou, Harley Quinn's hyena. In addition to providing emotional support for the team, he also helps the villains drive their getaway car in the end.
- Unwitting Pawn: After the derby, it seems that the rival team, the Brainy Brawlers, have kidnapped Lou and left a ransom note. However, when Starfire and Raven help break into their supposed headquarters, it turns out the villains actually tricked them into breaking into a bank.
