( AUDIO: Auld Mortality, PROSE: The Hunting of the Slook) The majority of these branches are parallel, but intersection can naturally occur ( AUDIO: Quinnis) and sometimes make tangles. The Book of Futures describes the origins of the branching omniverse.The Doctor jokes that all good planets have a book of the future.The Doctor notes that good companions are modest: he asks Romana how many times she's saved the universe, but she hasn't kept count.The Doctor theorises that the Time Lords forgot about Funderell millennia ago, during the great cut-backs of the 53rd Bureaucratic Regime.The Book of Futures is made from parts of the Sleeks: its cover is Sleek skin, and the chains around it are their bones.When reading the Book of Futures, the Doctor mentions that in the beginning, time split the omniverse in two, and continued until there was an infinite number of times.The Doctor offers himself for execution in Romana's place.The life of more than one world is at stake. Why is this planet of such interest to the Time Lords? What lurks in the depths? But events have quickly spiralled out of control. On the ocean world of Funderell, Romana has been reunited with her old friend from Gallifrey, Sartia, and the Doctor is investigating the history and religion of this strange world.

And an even greater threat lies beneath the surface.

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