Quote from
I've reversed the polarity of the neutron flow, so the TARDIS should be free of the force field now.

Blu-Ray
In 2009 Doctor Who was produced in High Definition, and started to be released on Blu-Ray discs. As with DVDs these Doctor Who Blu-Ray discs also feature additional extra items and commentary (sometimes only in upscaled standard definition), and offering digital surround sound.
Spearhead From Space

Rating: PG
Runtime: 96 mins
BBCBD: 0230
Extras:
- A Dandy and a Clown
- Carry On: The Life of Caroline John
- Title Sequence Material
- Restoration Comparison
- Programme Subtitles
- Digitally Remastered Picture and Sound Quality
- The certification has been raised to PG due to the extras getting a higher certification than the episodes
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