Suddenly, as darkness engulfed Sarah from one moment to the next, she was frighteningly reminded of the time on Karn when she had lost her eye sight. But although the fright from her memory caused her jumpiness to triple, she also felt her remaining senses sharpen as her mind sought for the presence of her friends. She strained herself to listen for the sound of breathing and to feel the faint warmth of Harry's body somewhere to her right. There was no need to be afraid of anything, she reminded herself.

The sound of someone's soles on the concrete floor was so loud in comparison to what she had expected to hear that she was almost startled by it. Coming from the left of her and moving forwards, she knew it was the Doctor, but the idea of losing him to the pitch black darkness and the dangers that lurked within only scared her further. She had made the mistake to let go of his hand after being blinded once, and realized now that she did not want it to happen again.

At the risk of taking poor Harry with her against his will, Sarah reached for his arm, knowing well where he had been before the lights had gone out and dragged him with her to follow the sound of steps into the inky nothingness. "I'm right here, Sarah, no need to rush!", Harry said, almost too casually, as he stumbled after her. Maybe he had noticed that she was not as brave as she had attempted to be, maybe it was just a bit of his old-fashioned courtesy talking, or maybe it was both, but either way, she wouldn't want to miss him any less now than the Doctor.

"Doctor, wait for us…!", Sarah hissed and held out a hand as she tried to establish a link with the man somewhere in front of her. Although hoping to brush the corduroy of the Doctor's jacket, all she felt was the air, and its soft movements between her fingers as she walked forwards. He didn't reply to her call, and neither did he wait up, so Sarah was forced to keep moving. It was not before long that the idea of getting lost entered her mind. The problem that she couldn't see and was vaguely following the echo of steps meant that both she and Harry could possibly drift away from the Doctor, and might find themselves walking straight into one of these dreaded mirrors left or right.

But then, something unexpectedly brushed the cloth of her outstretched hand's sleeve. By all common sense, she should have been startled by the touch, yet a familiar presence caused her to remain calm. Sarah reached out again, and this time, her hand touched the skin of another. The strange coldness of it meant that it could only be the Doctor who was seeking not to lose his companions. And so, when he linked his fingers with hers, she was more than simply relieved to know him nearby. It was as though the physical link between the three of them, with her in the middle, strengthened each other's confidence as well as their fear. There was no way to explain just how she knew, but through the touch, Sarah could tell that Harry was not a whole lot less worried than she was and that underneath the Doctor's outward courage, he was just as frightened and nervous as the rest of them. 'Just another ordinary man facing the unknown…' As the thought crossed her mind, Sarah gripped the Doctor's hand a little tighter, hoping to send a reassuring feeling of support back through the link. She wanted him to be as fearless again as the Time Lord she remembered.

Although the presence of her best friends was strong now, so was the mirror's presence. There was a faint humming in the background which soon filled her ears along with their echoing footsteps. Sometimes she thought she saw the palest of glows in the corner of her eye. The impression that the strange tetrahedron-shaped machine reflected in the mirrors was scanning them, watching them, left an uneasiness that struggled for dominance over her mind against the reassuring proximity of those that she wanted to protected and was protected by.
They progressed slowly, if not warily, but with every step towards the centre of danger, the presentiment of something lunging at them out of the shadows grew stronger.

She couldn't tell how far they had made it, or how far it was still to go, although she secretly wished it was further than she assumed it was. But when a blinding light struck her, her wish remained unfulfilled.

All of a sudden, someone had turned the large industrial lamps on the ceiling back on. Sarah blinked, confused as her eyes struggled to adjust to the abrupt change, but even through pale colours and a blurred vision, she immediately realized they stood right in the middle of the corridor, only halfway to the centre.

"-What was that?" It was the voice of the Brigadier coming from the corner of the warehouse.

"Turn it back off! QUICKLY!", the Doctor yelled sharply at him. The panic in his voice was unexpected, but underlined the danger they were in.

After her eyes had finally adjusted, Sarah was met with the frightening sight of her own and her friends' reflection being replicated across the mirrors tenfold. And that wasn't all. Some of the false tetrahedra started to glow, and there were more, other people appearing in the mirror images. She could only guess that those were the reflections of some of the poor victims. How did she know those weren't the people themselves? Their faces, their haunting, emotionless stares. There was something very disturbing about each and every one of them. Sarah had never in her own life looked at her face in the mirror and felt so deeply disturbed by the notion in her own hazel coloured eyes. A mechanical, inhuman look.

To add further to their despair, the Brigadier called back: "I can't! It won't turn off!" He hurried over to the corridor's entrance, but stopped abruptly as his eyes fell on the false images of people. His hand was hovering over the pistol on his belt, but he remembered the Doctor's lecture and decided otherwise. Except that he was lacking a good plan B now.

Sarah hardly dared to move, afraid to trigger a reaction. In fact, she was even afraid to breathe. Only Harry was looking around himself, preparing to defend himself in the case of an attack, and so he let go of Sarah's hand to raise his fists instead. He turned his back to her, trying to put her in a safe place between him and the Doctor. That was also when she realized anew that the mirrors were all around them. Just in the moment that the danger in her back became as real a feeling as the Doctor's fingers between her own, the tall professor was suddenly pulled away from her.

It all happened so suddenly. She barely caught a glance of the hands that had led to the Doctor's fall by catching his ankles and the arm which wrapped around his waist, before she was dragged in with him. A scream of fright escaped her as the Doctor was swallowed by the mirror behind her and their linked hands had just become her doom. The same reflection that had protruded from its frame to pull in her friend now reached for Sarah's wrist. At the same time, another pair of hands grabbed at her legs as well.

The pull was incredibly strong. More than it should be for what looked like a mere copy of herself. The Doctor's hand slid through the seemingly open mirror surface without a sound and took Sarah's with it. His face was already gone behind layers of other reflections and a mix of blurred colours. She should have let go – he had already – but she refused to. Not while there was still hope. Another sudden yank, and before Sarah could even realize what was happening, she slid halfway into the other world. She might have been gone completely, had it not been for the hands that had grabbed her still uncaught arm. It was Harry, who pulled her back into the other direction.

"Hold on, Sarah!"

Throwing her head around, Sarah gazed up into his pale eyes and knew, in that specific moment, that his heroic attempt at saving her would be in vain. The inhuman reflections were not letting go, and the strain on her arms and legs made her feel as though she had been put on a rack. Waves of pain rushed through her muscles and grew even more intense in her shoulder as Harry bravely stepped against the mirror's frame to steady his counter-pull. If he was not going to be pulled in with her, he would snap her shoulder. Either way, he was not going to be successful. Although Sarah wanted to stay optimistic, she could not see how he was going to make it.

So she did the last option that was left to her and opened the hand with which she held onto Harry's arm, allowing the reflections to drag her into their pocket universe with them. He struggled to keep her out, not wanting to accept that she had given in, but her change of mind had come as too much of a surprise for him to act against the sudden increase in the downwards pull.

The last thing she felt was Harry's fingernails scratching along her sleeve and the last thing she saw of him was his horrified face staring at her before the mirror's surface closed from the inside and he vanished from her sight along with her only exit.

==== ==== End of EPISODE 4 ==== ====

And that's the Episode 4 cliffhanger!
I know this Episode is a little shorter than the last, but that's going to be alright - I have a feeling Episode 5 is going to need some extra pages. I don't have much to comment on this Episode, actually, though I can say I am very glad not having to write the skips in time anymore. They made the past chapters feel a little too much like they were cut in bits. From here on, the story will progress fluently, and there will be no missing out on entire days or weeks.
I've noticed a little too late that there isn't an actual "Harry" POV part in this chapter. But if it's any reassurance, he has an amazing part to play in the upcoming chapter...!