An intriguing tale of two space-faring civilisations who find themselves contesting possession of a Big Dumb Object, in this case a ship that appears to fade into another universe, with the Eighth Doctor and Sam arriving and getting mixed up in it. There’s some good sfnal stuff about time paradoxes, though I was a bit sorry that Sam’s character appeared to have lost all the development of the last couple of volumes in the series. Nice Doctory characterisation though, and generally clear writing.