The Doctor's eyes showed no emotion, like if they were made of glass.
He just stared at the wasteland.
He smiled half-heartedly.
"You remind me of them."
The scenery changed once again. It showed images of several diffrent ponies and their TARDISes. Every one of them was in company of one or multiple ponies, and they were all laughing, smiling, having a good time.
"... Every single one of them..."
The ponies were now shouting, screaming, crying before the Doctor's TARDIS, as it dissapeared.
"...I left every one of them. They all trusted me, they all thought they'd travel with me forever..."
He looked to his left, where a gray pegasus stood, crying.
"... You said... You said you wanted to protect me..."
They all recgnized her: it was Derpy.
The Doctor's eyes filled with pain.
"It was true! It was all true, Ditzy! I... I'd never hurt you..."
"You lied, Doctor... The truth is that you're lonely... You pick up random ponies from Equestria and take them on your travels... you promise them all of space and time..."
She chuckled half-heartedly.
"You promised me..."
"But... But I did! I travelled with you as long as I could, didn't I??"
She ignored him.
"...Then... When they aren't fit and young anymore... You throw them away, like old dolls..."
The Doctor fell on the floor, crying.
"It's not true!!!"
"Oh, yes it is... You're truly and uttelry alone, Doctor... And there's nothing you can do to change that..."
The mare stepped into the shadows, and the images dissapeared, leaving only a crying Doctor on the floor.
"It's... It's not... It is... It's all so true..."