When Nick takes a picture of the first missing child on his cellphone, the image features the boy. When Wu confirms the picture, it features the missing boy and his dead mother.
During the intro scene, the father sits down and opens the container of worms and then says 'Silencio'. The show cuts to the son, who replies 'I know', and then cuts back to the father, who opens the closed container of worms.
When the La Llorona comes out of the old shack with the three children, the two boys are on her left and the girl is on her right, all holding hands. Then they are next seen walking along the river with the girl on La Llorona's left and the boys on her right.