BBCi Doctor Who

The most dangerous book in the universe has been stolen. Would-be universe conqueror Skagra seeks out the location of the lost planet Shada, home to a Time Lord prison, from a Time Lord who's a professor at Cambridge and is old friends with the Doctor.

The most dangerous book in the universe has been stolen. Would-be universe conqueror Skagra seeks out the location of the lost planet Shada, home to a Time Lord prison, from a Time Lord who's a professor at Cambridge and is old friends with the Doctor.

The most dangerous book in the universe has been stolen. Would-be universe conqueror Skagra seeks out the location of the lost planet Shada, home to a Time Lord prison, from a Time Lord who's a professor at Cambridge and is old friends with the Doctor.

The most dangerous book in the universe has been stolen. Would-be universe conqueror Skagra seeks out the location of the lost planet Shada, home to a Time Lord prison, from a Time Lord who's a professor at Cambridge and is old friends with the Doctor.

The most dangerous book in the universe has been stolen. Would-be universe conqueror Skagra seeks out the location of the lost planet Shada, home to a Time Lord prison, from a Time Lord who's a professor at Cambridge and is old friends with the Doctor.

The most dangerous book in the universe has been stolen. Would-be universe conqueror Skagra seeks out the location of the lost planet Shada, home to a Time Lord prison, from a Time Lord who's a professor at Cambridge and is old friends with the Doctor.