Avsnitt 5

Norman becomes homesick after receiving a letter from his mother. He goes for a walk by the river and meets Mike Johnson, a lieutenant from the nearby U.S Army base who shows him how to fish. Meanwhile, Mary agrees to help Polly and Dennis find out if Grainger is a spy. On the way back to the Farm, Polly and Dennis encounter a strange woman who bears a striking resemblance to the woman in the poster Cyril Jenkins showed them . When the woman asks for directions to the village, Polly, convinced she's an enemy spy, intentionally sends her the wrong way and thinks they've seen the last of her - until she turns up at the front door!