Tardis

Spoilers are precisely defined here. Rules vary by the story's medium. Info from television stories can't be added here until after the top or bottom of the hour, British time, closest to the end credits roll on BBC One. Therefore, fans in the Americas who are sensitive to spoilers should avoid Tardis on Sundays until they've seen the episode.

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Tardis
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Tardis

A gravity globe, or grav globe, was a human device to provide massive illumination. It could be sent aloft under its own power so that it would "hang" at a set height and provide light in a large space. Gravity globes were particularly useful in large dark caves.

Ida Scott used a globe to light up a cavern ten miles beneath Krop Tor's surface. (TV: The Impossible Planet / The Satan Pit)

The Eleventh Doctor used a globe to light up the Maze of the Dead. (TV: The Time of Angels / Flesh and Stone).

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