"Monkey Fun" is the 13th episode of the second season of Superman: The Animated Series, and the 26th of the overall series. It depicts the appearance of Titano, a monkey that Lois knew in her childhood. After years of being dormant out in space, Titano is brought back to earth. However, due to the effects of a strange gas, Titano suddenly starts to grow. Though not at all malevolent in his actions, Titano is still massively destructive and Superman must find a way to defeat him.