This episode has a lot of twists & turns. What
You think will happen & what actually happens will surprise you. The actors & writters did an excellent job! 
 Grab a cup of tea,go to the sea side on a dark foggy night & snuggle up in a blanket while listening to this mystery.Look out to sea for distant lights & listen to fog horns. I suggest you DONT go by your self. This is a real sailors yarn....