Episode Description: Beware, spoilers! To read - hover over the text.
The TARDIS is on a pirate ship in the 17th century, where people kidnaps Serena through the portal: water. To evacuate the crew does not, it simply flies the TARDIS from the Doctor in an unknown direction. The portal is not water, but a reflection, so shiny things from the ship trying to hide. The crew of the ship flying into space on this space ship.