When Stars Collide, a BH6 x Dr Who crossover

Chapter One - Earthquake

Disclaimer: I do not own Dr Who or Big Hero 6. Their rights remain with their respective creators.

This story takes place after my BH6 one-shot, Sick Day, several months after the events of the movie.

Chapter One: Earthquake

Hiro Hamada stared out the window of his third story bedroom. Dark clouds hung low in the sky while water ran down the glass panes. The sky's tears mirrored the ones the fourteen-year-old boy wouldn't, or couldn't, let fall.

The dark-haired boy toyed with a small robot he'd named Megabot. The deceptively simple design had won many a bot fight before he'd found a new path in life. It was a path that changed him in so many ways. But that wasn't the reason he felt the now familiar ache in his chest.

Several months had passed since his older brother, Tadashi, had died. It was still hard, even though he had all the support in the world from his gang of college-aged friends. Not to mention the somewhat goofy looking robot his brother had left behind.

Baymax had become part of the family, an integral part of Hiro's identity. And when they'd unwittingly become super heroes, well, that also changed things. Saving people's lives had helped heal at least a small part of the dark mass still living inside him.

But the rain. The rain made it seem as though none of that had happened. He felt alone, cut off from the rest of the world. It was the same feeling he'd had off and on since Tadashi's... death. He couldn't quite bring himself to think murder, even though the fire that killed him had been set on purpose.

With a sigh, Hiro set Megabot back on the desk. Sometimes it helped to hold the cold metal body, a reminder of what he'd given up, and what he'd gained. But, today, it didn't help. Not even thinking about all the good that had come from that tragic event helped.

Trying to push past the lethargy, Hiro swung away from his desk and sent his wheeled chair across the floor. The castors lost traction as they connected with a shirt he'd dropped and not bothered to pick up. The slight jolt almost unseated him, but he managed to stay upright.

Why did it have to rain? It had rained the day of Tadashi's funeral. Despite there not being a body, there was a headstone. The service had been short, with black umbrellas held high to ward off the crying sky. And then, later, it had continued to pelt against the house. Hiro had sat at the top of the stairs leading to his room while his friends and aunt consoled each other on the second floor above the Lucky Cat Café.

Hiro clenched his fists. He wouldn't cry. Not even when he remembered Baymax's words that it was okay to cry, that it was a natural response to pain. And he was in pain. Emotional pain. Why hadn't it rained since then? Why did it have to rain now?

The boy dropped his gaze to the floor. Near the wall sat the red case where Baymax was stored. The robot was not currently activated, and he was almost tempted to call out with the one word sure to wake the medical bot, but he couldn't make it come out.

An almost sonic-level sound seemed to pierce his eardrums and the boy cried out as the ultra-hi tone wave crashed through his skull. What the...? It left his eyes watering and his balance off as he lunged away from the chair, the world seeming to heave around him. He misjudged the distance and ended up slamming into the floor instead. "Ow!" he exclaimed.

Still clenching his teeth, Hiro didn't hear the telltale sound of Baymax activating. But by the time the robot had inflated and stepped free of his case, the sound had stopped.

"Hello. I am Baymax, your personal healthcare companion," the robot announced. He looked down to where Hiro remained, nursing his knees. "Hiro, you have fallen."