Justice League Action: Season 1, Episode 41

1 - 41: Harley Goes Ape!

When Gorilla Grodd takes control over the giant chimpanzee Titano, the only person who seems to be able to override his control is the medical worker who nursed him as a chimp at S.T.A.R. Labs. Unfortunately, she's now known as Harley Quinn. As Superman wears a lead suit when going up against Titano's Kryptonite gaze, Stargirl must help Harley Quinn free Titano so that Superman and Stargirl can defeat Gorilla Grodd.