The BBC have released a press pack for The Sarah Jane Adventures series 4 which includes interviews with Elisabeth Sladen, Matt Smith, Daniel Anthony, Anjli Mohindra and Tommy Knight as well as synopses for each episode. You can read the interviews here and see the episode synopses below.

Ep 1 The Nightmare Man, Part 1 by Joseph Lidster

Luke faces life-changing events, and Bannerman Road will never be the same again. But when Sarah Jane's son has his first nightmare, he's haunted by a dark figure from his dreams. A strange entity is reaching out to our world, with terrible consequences for the whole human race.

Ep 2 The Nightmare Man, Part 2 by Joseph Lidster

With Luke, Clyde and Rani trapped in a bizarre dreamscape, Sarah Jane must fight alone! As the Nightmare Man grows stronger, only K-9 might hold the key. But can Luke summon the courage to face his adult life before the whole world is trapped in an endless nightmare?

Ep 3 The Vault Of Secrets, Part 1 by Phil Ford

When an old enemy, Androvax the Veil, returns to Earth, the gang face a dilemma – should they trust him? Or does the legendary Vault hold an even greater terror? But a second threat arises, when android guardians threaten to destroy anyone who uncovers their secrets.

Ep 4 The Vault Of Secrets, Part 2 by Phil Ford

As the battle between Sarah Jane, Androvax and the androids reaches its climax, Rani has to save her own mother from being caught in the crossfire. But as the Vault opens the destiny of the entire Veil species is at stake. Is it too late to save them?

Ep 5 Death Of The Doctor, Part 1 by Russell T Davies

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!

Ep 6 Death Of The Doctor, Part 2 by Russell T Davies

Old friends fight together to make one last stand against the sinister Shansheeth. But with Clyde and Rani trapped in terrible danger, Sarah Jane and Jo Grant realise their worst fears – their friendship with the Doctor might be the very thing that dooms them.

Ep 7 The Empty Planet, Part 1 by Gareth Roberts

Clyde and Rani wake up one day to discover that they are the only survivors of the human race! The whole of Earth is empty – even Sarah Jane has vanished. But a deserted London holds terrors of its own. Strange forces lurk in the shadows, as mysterious visitors approach!

Ep 8 The Empty Planet, Part 2 by Gareth Roberts

Clyde and Rani meet their enemy, as the Robots arrive on Earth – but what do they want, and where has the human race gone? It's a race against time, but without Sarah Jane's expertise, Clyde and Rani must trust each other like never before if they're to save the whole world.

Ep 9 Lost In Time, Part 1 by Rupert Laight

A harmless investigation turns into an epic quest across time and space. Sarah Jane and the gang are separated by the enigmatic Shopkeeper, and find themselves in three different time-zones throughout history – doing battle against ghost hunters, Nazis, Tudors and a mysterious parrot called Captain!

Ep 10 Lost In Time, Part 2 by Rupert Laight

While Sarah Jane tries to prevent a future tragedy, Clyde has to take on the Third Reich single-handed! But Rani discovers to her horror that the march of history cannot be stopped, as a greater danger from the Time Vortex threatens to consume them all.

Ep 11 Goodbye, Sarah Jane Smith, Part 1 by Clayton Hickman & Gareth Roberts

Sarah Jane faces her saddest day, as she realises that no one can defend the Earth forever. She's saved the world so many times, but must now hand over the task to safer hands. Clyde and Rani are distraught, and the forces of darkness gather as the inevitable day approaches.

Ep 12 Goodbye, Sarah Jane Smith, Part 2 by Clayton Hickman & Gareth Roberts

Sarah Jane has gone – but a new regime begins at Bannerman Road! Clyde and Rani must face the fact that nothing lasts forever – but can they still unite as a team, to face a new and deadly threat from outer space? Or is the old gang finished for good?

In other news, Digital Spy have given 10 teasers for Death of the Doctor.

1. Doctors 1, 2, 3, 4, 10 and 11 all make an appearance.
2. There's mentions of Axons, Azal and Aggedor.
3. "Smells like roast chicken!"
4. The Brigadier is still stranded in Peru, while Liz Shaw is on the Moon.
5. That's Groske, not Graske.
6. The Doctor doesn't have to be white. And he can regenerate more than 12 times - a lot more!
7. "You look like someone's baked you!"
8. Jo Jones (née Grant) has 7 children and (almost) 13 grandchildren.
9. The Doctor might never look back, but Sarah Jane has discovered some interesting things using Google.
10. "Accelerate the weave!