Dear Laura,
We are the Daleks and we entered the Shee Ark after a "Hand" accidentally imported us! The Norns, Ettins and Grendels will be exterminated! Exterminate! Exterminate! EXTERMINATE!
- The Daleks
Dear The Daleks,
Hunt as you may you won't find any Norns, Grendels or Ettins to exterminate. The Hand quickly realised its error and is already one step ahead of you. As you may now realise, you have been imported into a dimension in which the Shee Ark is quite empty. Don't worry; you won't be alone for long as the good Doctor is already on his way. 
- Laura