Doctor Who: Ghost Stories #4

The Doctor, Grant, Lucy, and Jennifer wind up on a planet that has already fallen to the Harmony Shoal - the vicious villains who threatened Earth in the TV Christmas Special! While Lucy and Jennifer get to the bottom of this strange planet, and how the Shoal took over so easily, the Doctor and Grant try to strike at the source of their power! And, speaking of powers, Grant's are suddenly on the fritz...!