A/N: This chapter may still have you gasping but, all is going to be revealed as my story nears an end with only a few more chapters to go... All I'm saying is, it's not what you think...

'Octavian Wasn't Lying'

The Doctor stay knelt down by himself- looking at his cold, dead face in front of him. River Song had just killed him, the woman who he thought he could trust or even go as far as saying loved.

"Octavian wasn't lying, that woman is trouble, and she can't be trusted. Why didn't I listen to him? I never do, I always think there's some good in everyone, I guess I was fooled as she seemed to have a close relationship with me in the Library but, why didn't I see through it?" he accused himself. "River Song, you sinister minx!" he called out in hatred.

The Doctor caught sight of something on the ground next to the gun, a sonic screwdriver. He picked it up and tucked it in his pocket with the other Doctor's Psychic Paper. "...You won't be needing these anymore..." he sighed.

Vengeance boiled in the Doctor's blood as he rose, he wasn't sure if he should hunt her down and kill her himself or let the authorities deal with her- the Stormcage. But, that wasn't his style, he would let her explain first and if he doesn't believe it then he'll decide from there.

Before he set off in search of River he knelt down and picked up the gun she had used to kill him. His hand was shaking as he lifted it from the leafy floor, his finger set on the trigger ready to fire if he saw her. A tear formed in the corner of his eye and it fell to the floor with a small splash. "...I thought I knew you, River, I thought I loved you..." he whispered. His grip loosened on the gun and it fell with a thud to the ground again. He couldn't bring himself to do it. He tried once more to hold the gun, but with his finger away from the trigger. He may not shoot her with it but he could use in other ways, just in case he tucked it in his pocket.

The Doctor composed himself and set off to hunt down River Song. He made a dash for the direction the deceased version of him was pointing in, trying as hard as he could to catch up to her. There was no sign of her anywhere but he was sure he'd come across her again at some point.

He continued running, his feet were soundless but he could hear something- a heartbeat, a lone heartbeat and he began to follow its sound. It grew louder and louder as the Doctor continued running. He caught a glimpse of golden curls in the distance, it was her. His hand twitched as he wanted to reach for the gun and fire manically, but love was stopping him- he could never not love River.

'Pay attention- it's not really her!'

A note of desperation was sent on the other Doctor's Psychic Paper, but not his. The note must've been sent too late, the other version of him had dies without knowing that it wasn't really River who shot him, unless it's a lie. But, if it was a lie at least he could've died believing that his lover wasn't really the one who killed him.

Just then, River came to a halt- at the edge of a cliff.

"Hey!" the Doctor called out as he neared her. The heartbeat he could hear was very loud now and beating a bit faster- it was hers alright.

She turned on her feet to face him, she looked different. Something about her wasn't quite right and as the Doctor studied her very carefully he could tell. His eyes locked onto hers, they didn't give off the same tranquil and loving glow as they normally do and that's when he knew it wasn't really her, or it wasn't really her consciousnesses controlling her.

The River imposter smirked slyly and took a step back, falling over the edge of the cliff. The Doctor ran to the edge and stopped. He looked over and saw nothing but fog; she wouldn't have disappeared already if she did genuinely fall. The heartbeat was still strong, so surely that would mean that she was still alive, wouldn't it?

The Doctor bit his bottom lip as he debated whether he should jump and resume his pursuit of her to find out the truth or not. After a moment of deep thought, he jumped into the fog and as he fell the plea's tune started to ring in his head louder and more desperately, he was getting close...