Watch A Preview Clip Of Secret Universe: The Hidden Life Of The Cell Narrated By David Tennant

As we previously reported, David Tennant will be narrating a new documentary, Secret Universe: The Hidden Life Of The Cell,  for BBC Two and BBC HD on Sunday 21st October at 8.00pm.
The BBC have now released a preview clip of the programme, which you can watch below:

About the programme:
Documentary telling the story of what happens to a single human cell as it comes under attack from a virus, showing how it defends itself from the hostile organism. The film uses CGI to show the membrane that acts as a security system, the remarkable turbines that power the cellular world, the nucleus housing DNA and the construction of thousands of different proteins all with unique tasks.