On the day of his test, Mutta sends Hibito a novelty Pretty Dog double mirror as a lucky charm, having read that looking at oneself objectively can help with panic disorders. Hibito wears it strapped to his spacesuit arm as he descends into the water. While underwater, Hibito proceeds through a simulated mission without a panic attack. Part way through, Butler triggers a green card to test his reasponse to an accident. Hibito receives an alert that his CO2 level is rising and copes well with the situation. Sceptical of Hibito's suitability, Gates triggers a second green card without telling Butler. Hibito receives an alert for a CO2 sensor malfunction and his heart rate rises, but with the help of Mutta's advice he manages to stave off a panic attack. A second run of short Mr. Hibbit episodes airs after the credits of some episodes from this episode onwards.