Doctor Who and the Planet of the Spiders

‘As yet they have not managed it,’ he said placidly, ‘but they
will – very soon.’
Tommy slipped out of the room and the old Abbot turned to
the Doctor. ‘Now, Doctor, I think you have a story to tell me.’
‘Somehow I have a feeling you already know most of it. It
concerns a certain blue crystal that I found...’
‘Found?’ interrupted the old man gently.
The Doctor rubbed his chin. Sarah could see that he was
rather taken aback. ‘Well, perhaps “stole” would be a better
word.’ The Doctor looked at the old man sharply. ‘Forgive me –
but have we met before?’
K’anpo smiled benignly. ‘The recognition of friends is not
always easy. Tell me about the crystal that you – stole.’
The Doctor cleared his throat. ‘Ah, well, yes... It didn’t occur
to me that I was stealing it of course – not at the time...’
As the Doctor launched into his narrative, Sarah sat back
unnoticed watching the calm face of K’anpo Rinpoche. There
was something very strange, very powerful, about this frail old
man. Sarah could see that the Doctor had noticed it too.
With a wrenching and tearing noise, the cellar door burst open
at last, the iron lock torn clean from the wood. Barnes, Moss,
Keaver and Lands all tumbled out into the corridor on top of
one another. Barnes assumed control. ‘We must spread out and
search for them. They won’t have gone far.’
Little Moss shook his head vigorously. He’d had enough.
‘I’m leaving. I don’t want anything more to do with it.’ He had
time to take only a single step before something inside his head
caught and twisted at his mind. Moss screamed, his hands
clawing at his temples. ‘No, no, please stop it. I’ll do anything.
Please, make it stop!’
The pain died, and the icy voice in his head said, ‘You will
obey me?’