At the very beginning of the episode the mother goes out to investigate the noise, and we see a shadowy figure standing in the window. The mother says something to him and he raises his finger to his mouth and says, "Shhhh...". We are meant to think it's the father, as the mother did. However, a split second later we see the father sitting in an easy chair looking tired, and jolts upright when he hears his wife scream. He goes into check on the baby, is relieved that it's okay, sees the blood on the pillow and looks up.