This is the episode that features Katy Manning as Jo Grant!
The video can now be seen below:
Meanwhile, the British Film Institute have issued a short synopsis of the episode:
When the Doctor is declared dead, old companions Sarah Jane and Jo Grant meet for the very first time, and join forces to discover the truth.
As an interstellar conspiracy gathers around UNIT HQ, Clyde finds that he holds the fate of the Time Lord in his hand – quite literally!
Also, the BBC Press Office have revealed information for a planned Sarah Jane Adventures Red Button Quiz:
Viewers who press the red button after the popular children’s drama can test their knowledge in the Sarah Jane Adventures Quiz. They can also watch clips from the show and answer questions put to them by the Bannerman Road Gang; test their memory and observational skills; and if they make the grade they can go to the website and download a special certificate saying they have passed the “Red Button” level of the Sarah Jane Academy. Available this October.