Doctor Who Season 10: 6 Big Questions We're Asking After 'The Pilot'
4. Is There More To Bill Potts Than Meets The Eye?
At first she seems like an ordinary girl, an old school companion in the mould of Rose or Donna in contrast to the exceptional Amy Pond and Clara Oswald who both started out as mysteries for the Doctor to solve. But safe conventions such as using the assistant as the audience identification figure aren’t the Moffat way. There are signs already that Bill Potts, knowingly or unknowingly, has her own remarkable secrets to set her apart from the crowd.
There has to be more to the Doctor’s fascination with Bill than the fact that she smiles in his lectures. Whoever she is, the Twelfth Doctor was moved enough to go back in time to take photographs of her Mother. It’s not like him to get all sentimental. Then there’s that very odd cut to Bill when the Doctor is reminiscing about Susan. Whatever the link, the Doctor is clearly associating the two.
Bill laughs at how the Doctor runs "like a penguin with its arse on fire". But just a few scenes later, we see her running almost as awkwardly as the Doctor. Could it be a genetic trait, passed down from grandfather to granddaughter?
If that sounds farfetched, then consider the hidden vault. Its location is supposed to be only accessible to those with a personal connection. How then did Bill Potts get through the door?
And finally, there’s that tear which isn’t hers. The logical conclusion is that it belongs to Heather, but whoever it belongs to, it’s a signal that Bill is not quite as straightforward as we thought.