Return of the Silurians

Actress Neve McIntosh has let slip that the lizard-esque monsters seen in the Doctor Who Series 5 trailer are, as suspected, classic series enemies The Silurians.
McIntosh will appear in episodes eight and nine of the fifth series in a two-part story written by Chris Chibnall. Part one is thought to be called The Ground Beneath Their Feet with the conclusion entitled Cold Blood.
In an interview with Perthshire Advertiser, she said, “The stories have got a bit darker. I play twins, and they’re big lizardwarrior women. They’re one of the Silurian tribes that have been undisturbed under the earth. And of course we get disturbed.”
McIntosh also gave her thoughts on Matt Smith’s Doctor, “I think he’s going to be really good, the best yet out of the new guys.”
You can see some filming pictures from the episode here.