Shadows Of the Vashta NeradaNo of Episodes: 1
Writer: Phil Ford
Starring: Matt Smith, Karen Gillan, Nicholas Briggs, Sarah Douglas, Barnaby Edwards, Eleanor Matsuura
The Doctor and Amy discover a sub-aquatic base that's been attacked by a sea monster from another world, but its crew are living in fear of something else - a voracious horror that hides in their shadows. The Vashta Nerada.