Doctor Who and the Empire of Glass
Vicki took the card from Steven. "Who gave it to you?" she asked the Doctor.
"I don't... I don't remember," the old man admitted.
"It's a trap," Steven said firmly. Vicki watched with some amusement as he narrowed his eyes, squared his shoulders and generally tried to look heroic.
"Don't be stupid, Steven," she said, and placed the card carefully upon the top of the translucent cylinder in the centre of the control console. "How can it be a trap if it doesn't even tell us where to go?"
With a low hum, the collection of fragile objects in the centre of the translucent column, the things that had always reminded Vicki of a cross between a child's mobile and a butterfly collection, began to revolve around their central axis. The column itself began to rise and fall rhythmically, whilst lights flashed on the console and the deep vibration of the TARDIS in flight slowly spiralled down towards the grinding, clashing noise of landing.