Episode Description: Beware, spoilers! To read - hover over the text.
Around the world night black cubes suddenly appear, which cannot be broken. Cuba have been inactive for a few days and the Doctor transfers the Supervisory responsibility for Brian, Rory's father. A year later, Cuba begin to revive and cause many people to feel a heart attack. It is all tricks of the shakri. who don't want the people settled in other planets and flying in space.