As Mr. Bradford is leading Major Hillgrove to the beach, there is a dog swimming in the ocean as Laura chats with Danny. The dog brings the stick to be thrown back into the water, and he is completely dry.
When Oliver's parents are sitting with John, the chairs change back-and-forth between each shot.
It's dark the first time Laura (Dorothy McGuire) comes upstairs after Oliver's (Robert Young's) solo arrival, and she's carrying an oil lamp. The light, supposedly from the lamp, casts a marvelous shadow of the lamp itself onto the door. (The shadow of Laura's face on the door also reveals that there is another light source.)