Sylar thrust his hand forward at the empty space in front of him, and was rewarded with a thump and a groan.
"I know you're there," he hissed, a wicked smile flicking across his face. "Even the invisible man can't hide from me." He looked up at the cracked brick wall in front of him, and his smile grew as a bearded face faded into view, quickly followed by the rest of a body. Claude groaned again and looked up at Sylar.
"Sylar, right?" he muttered. "I've heard about you. Heard what you do to us." He paused as a whirring, grinding sound filled the air.
"Then this shouldn't be a surprise to you," replied Sylar, raising his finger. He pointed at Claude's head, and slowly began to slice it open...

"Gabriel!" The killer stopped at the sound of a bellow behind him. Keeping Claude pinned against the wall with one hand, he turned to look behind him. A tall, thin man stood there, his long brown coat billowing around him as he raised his arm. In his hand he held a strange pen-like device, which glowed with a blue tip.
"I'm giving you one chance, Gabriel," the man said, advancing slowly. "Let Claude go and I won't hurt you. Just one chance." He glanced at Claude, still gasping for air by the wall, and whistled through his teeth.
"I see what she meant, you do look like me..." he murmured to himself, before shaking his head and looking back at Sylar.
"Come on, Gabriel, let him go." Sylar narrowed his eyes and let Claude drop to the ground.
"I don't know who you are," he growled, balling his free hand into a fist. "But there's something you should know about me." Already the radiation was beginning to build up in his hand. He smirked and looked the stranger straight in the eye.
"My name is Sy-" His sentence was cut short as a crowbar came down upon his head, knocking him unconscious in seconds. In his place stood an imposing red-haired woman, breathing heavily.
"I got him, Doctor!" she shouted. The stranger rolled his eyes and slipped his pen back into the folds of his large coat.
"Well done, Donna," he said, before turning to Claude and grinning.
"Hello there Claude, you haven't met me yet, but I'm the Doctor and I'm not done saving your life yet," he gabbled, seizing Claude by the hand and shaking it vigorously. "Well, I am, but I'm going to do it again. Well, I already have done it again. But I haven't done it yet." He paused and turned to Donna questioningly.
"No, you're not making any sense at all," she told him with a faint smile. The Doctor beamed and turned back to Claude.
"Brilliant. We'll be going now, but I'll have seen you again in a moment four years ago. And..." He leant in close and whispered in Claude's ear.
"Remember to roll when you land."

With that, the Doctor bounded off around a corner, Donna struggling to keep up. Claude rubbed his eyes and looked down at Sylar's still body as the groaning sound filled the alleyway again. His eyes widened and he ran around the corner after the duo.
"Wait!" he shouted. "What do you mean about" His voice trailed off – he was at a dead end, and there was nothing there but a faint breeze which quickly died down.