The Doctor stepped off the bus, looking back at the shimmering air as the rift snapped shut. He had saved the world again, but as he watched Christina being led away by the police (only to make a daring escape using a jetpack), his expression saddened.
The Doctor grinned. "I like your spirit. But the bus is our only way back, and its wheels are buried. We need power, we need lift, and we need it before that swarm hits." [S0E13] Planet of the Dead
Beside him, Lady Christina de Souza brushed dust off her expensive leather jacket. She didn't look terrified. She looked bored. The Doctor stepped off the bus, looking back