New Trailer For Series Four Of THE SARAH JANE ADVENTURES

A trailer just surfaced for the upcoming fourth series of Doctor Who spin-off The Sarah Jane Adventures, which follows the exploits of Sarah Jane Smith, former companion of the Third and Fourth (and occasionally Tenth) Doctors.  Of note in the embedded video below is the appearance of Matt Smith's Eleventh Doctor.  He will be appearing in "Death of the Doctor" alongside another former companion of the Third Doctor, Jo Grant.  The new season begins in the UK on Monday, October 11.

Here's some background on the series from the official site:

"Sarah Jane Smith is well acquainted with saving the world. An old friend and companion of the Doctor, Sarah Jane has travelled the universe, solving mysteries, tackling monsters and fighting alien foe all the way. Her travelling days may be behind her, but as a journalist with a nose for trouble, Sarah Jane often finds herself on amazing adventures closer to home. With the help of her adopted son, Luke, his best mate Clyde and their new neighbour Rani, along with her sonic lipstick, and the alien computer Mr Smith, she must defend Earth from extraterrestrial threats and monsters."