Part 9 (1/2)

'The wall just opened.'

'Part of the benign intelligence must have triggered a hidden mechanism.'

'Did the same thing happen for you?'

The Doctor explained how they had broken down part of the wall.

'Where?' asked Tegan, surprised.

Hayter ran across to where they had made their entrance. 'The blocks have been put back!' He ran his hands over the smooth stones. All evidence of their entry had been removed.

They were trapped.

At that moment the Doctor knew - as surely as Nyssa felt - that the power was returning. The pa.s.sengers outside would not, of their own free will, have reneged on the Doctor. They must be acting under hallucination again. Once more the invisible power haunted the Citadel.

That part of the intelligence in the casket which sympathised with the Master's evil schemes was working against the Doctor and his friends, and had walled them up, helpless, inside the Sanctum.

Professor Hayter was the least anxious of the prisoners. With the pa.s.sionate curiosity of an archaeologist exploring a Pharaoh's tomb, he examined the various artefacts in the chamber.

'Doctor, come and look at this.' The Professor held up a small doll-like object. 'Some sort of figurine.' He looked around him. There's another, and another ... Could they be votive offerings? In which case, this chamber might have some religious significance.'

'Let me see that.' The Doctor took one of the figures from Professor Hayter and held it gently in his hands.

The detail was perfect. It might have been a statuette of some Greek G.o.d, only the unnatural completeness of all its features could never have been achieved by any sculptor.

'The Xeraphin,' said the Doctor in a hushed voice.

'Who are the Xeraphin?' asked Nyssa.

'They were supposed to have lived on the planet Xerophas before it was devastated by crossfire in the Vardon-Kosnax war.'

Hayter gave a little cry. 'Please, Doctor. On top of everything else, not little green men from outer s.p.a.ce.' But by now he was prepared to believe almost everything.

'There's nothing green aoout the Xeraphin,' the Doctor continued. 'The most highly developed creatures in the universe. Beings of immense mental power.'

As he examined the figurine he recognised the handywork of the Master. 'The Tissue Compression Eliminator,' he muttered.

'What's that, Doctor?'

'That little toy of the Master's. If he used it on you, your whole body would be compressed ... just like this.' And he held up the petrified homunculus.

The Professor could not understand how the Xeraphin came to be at large in the Citadel.

'They came from the sarcophagus,' explained the Doctor.

'But the thing in there is still alive, and there's only one organism,'

protested Hayter.

The Doctor, however, was at last beginning to understand the nature of the intelligence in the casket, and the energy in the Citadel.

'No wonder the animus is so strong,' he gasped. 'Apart from the Master's victims, the whole race of the Xeraphin is in that sarcophagus!'

During his flying career, Flight Engineer Scobie had frequently wanted to tell his superiors to get lost. When however, he saw the Skipper and First Officer transported to oblivion before his very eyes he was appalled.

The plan had gone badly wrong. From his hiding place, Roger watched the Master scurry to and from the TARDIS, clutching various peculiar appliances. He had observed the man's temper become more and more frayed. He had finally watched him abandon the Doctor's police box, and laugh demonically as it vanished into thin air.

The idea had been for Captain Stapley and Andrew Bilton to travel with the Master and keep in touch with the TARDIS. Heaven only knew where they were now. Meanwhile the Master seemed quite happy without the Doctor's amazing machine. He collected a few more items and left the chamber.

Scobie had absolutely no idea what to do next. There was no way he could help Stapely or Bilton, so he decided to find the Doctor and explain that the Master was at large in the Citadel, and that the TARDIS had disappeared.

He crept down the corridor keeping a wary eye open for the Master.

A familiar figure in airline uniform emerged from the shadows at the far end of the corridor.

'Angela!'

'Roger!'

'Where are the others?'

She didn't answer his question. 'I can't hold out much longer.' The girl was in a bad way.

Roger Scobie realised that the hallucinations had returned, and that Angela was fighting the dream world. 'Angela, don't give up now!' He tried to comfort her and encourage her resistance. 'You mustn't let go of your mind.'

But it was obvious the poor girl was having an enormous problem resisting the illusions. How lucky for the flight deck crew that the Doctor made them reject the induction effect at the outset.

Angela was amazed that Roger could hold back the world of unreality with so little effort.

Roger Scobie explained. 'The Doctor destroyed the illusion as soon as we landed. Even when the Plasmatons got hold of us ...'

'The Doctor!' she interjected. As if he had touched a raw nerve.

'Was the Doctor with you?' Scobie needed to find him at once and explain what had happened to the TARDIS.

'The Doctor ... Yes, I think so.' She was becoming vague and sleepy again.

'Did you break through the wall? Did the Doctor get into the Sanctum?'

Scobie buffeted her with questions.

'Yes.'

'Come on!'

They both hurried off down the corridor.

The hall was empty when they arrived. Roger guided Angela, as if she were a sleepwalking child, to the central rotunda.

'Angela, where did you break through?'