Maybe a little bit late to reply, but the story about amnesia made me think about the 2nd season of the anime The Melancholy of Haruhi Suzumiya. Half the episodes of this season are about a case of collective "amnesia" where the main characters experience the same two-week period over and over again (more than 15,000 times!). Only one character is able to remember every one of them. She was quite bored at the end.
From a conceptual point of view, it could be interesting to design eight episodes to have the exact same story, but with different drawings and voice acting each time, but from a viewer's point of view, I felt bored quickly.
So to make a link with the topic, amnesia --> sparingly.