Beast Boy is betrayed by Terra who he thought he could trust and was his friend. Beast Boy finds out that Terra is working for slade. Beast Boy does not want to believe Terra betrayed him. Terra used Beast Boy to sabotage the Titans.
Knuckles is about to kill Sonic, but Sonic warns him that Robotnik is about to steal the chaos emerald. Knuckles confronts Robotnik and tells him this is not part of the plan. Robotnik talks about how they weren't actually friends and continues to steal the emerald and betray Knuckles.
Rodriguez and Finch are alone near enemy lines. Rodriguez can't get up and tells Finch to escape without him, but Finch won't leave. They make their last stand together.
The math club illustrates how to use the distributive property in reverse through factoring. As the members of the club explain, this technique can be used to check your work when utilizing the distributive property.