1. Expiry Dating

The Doctor knows that River Song is a part of his future. A maddening, intriguing, but inevitable part.

Their lives are becoming inextricably intertwined, but in these early days – for the Doctor at least – they must navigate their relationship without too many spoilers.

Whatever her past, and the Doctor’s future, holds, River will make sure that he has fun untangling the mystery...

37 out of 51 (72.5%) raters say this story requires a previous story.