sentences:  The group find Skagra's discarded colleagues and learn he is after a Time Lord named Salyavin.Back on Earth, Clare Keightley accidentally revives Chronotis whose chambers are revealed as a TARDIS, the Professor explaining the book is a key to the prison planet Shada where Salyavin is held.Chronotis and Clare repair the TARDIS to reach Skagra's carrier, saving the Doctor and Chris after Skagra decoded the book and reveals his intent to absorb Salyavin's mind and use its telepathy to unite all life into a single Universal Mind.