Couldn't remember who'd shot whom on the detective DVD we watched last week.
Racked our brains but nothing came.
Had to fast forward the episode again in order to find out.
Had a brain wave.
Eventually we could de-clutter the DVD collection and only watch one series.
By the end of the series we wouldn't remember what we'd seen so we could start all over again to find out!
The same could apply to all the books too! Can you remember who 'dun it' in any Agatha Christie novels?