Starling Discovers the Moon

S1, E18: Young Starling makes a startling discovery one night: Earth’s Moon seems to be smaller than the last time she saw it. Can this be? Worried, she begins to chart the state of the Moon every night, which only confirms her worst fears: the Moon is disappearing!!! When she rushes around like Chicken Little, frantically warning everyone, they’re amused at her concern (and naïveté), and try to calm her down... but no one effectively explains how the Moon waxes and wanes over the course of each month. Determined to save what’s left of the Moon from disappearing altogether, Starling decides to travel all the way up there herself and do what she can to avert this catastrophe.