3x15 - OK K.O.! Let's Be Heroes

Rad and Red Action once again get caught in a feud. Getting annoyed at how far their bickering has gotten, K.O. and Enid use Red Action's time travel belt to travel to the past to make sure that the two do not bicker with one another. When they cannot find the problem, Rad finally reveals that it involved the events of "You're Everybody's Sidekick".