This is just a short commercial that aired earlier on BBC promoting the newest and most horrifying monster to Doctor Who with "The Silence."
You can head on over here for the full trailer released in December.
Doctor Who Season 6 premiers in both the UK and the U.S. on April 23rd with "The Impossible Astronaut."
The Doctor Who online prequel premiers this Friday March 26th at 4pm. (www.bbc.co.uk/doctorwho/dw).
Following the Series 6 teaser is a short teaser for the prequel.