Days of our Lives is a soap opera that has been around since the 1960s and once had a story about some guy who returned from a war with amnesia and, believing he is someone else, romances his own sister.
(Travel tip: The floors in Spain are a mess. When you go into a spanish bar you will see the floor all dirty with tissues, shrimps heads, toothpicks... don't be alarmed, is just the way they do it!)