Smiling Under the Night Light - S1.E5

If Natsuki sells Atri, he can get batteries. However, he can no longer think of Atri as just an average humanoid. While he's deep in thought on the dock, looking out at the ocean, Natsuki finds Catherine floating in the water. She is completely intoxicated, and Natsuki and Atri take her in. But right at that time, the sound of a gunshot echoes within the silent ship.