The series features Elisabeth Sladen as an investigative journalist helping aliens when they need it and preventing evil aliens from taking over the world. The target market is young children! 

There was also a Children in Need special segment starring Ronnie Corbett in From Raxacoricofallapatorius with Love on the 13th March. A Slitheen appears in the attic disguised as an intergalactic representative.

(L-R) Elisabeth Sladen as Sarah, Anjli Mohindra as Rani, Daniel Anthony as Clyde and Tommy Knight as Luke. Sarah Jane Smith (Elisabeth Sladen) and the gang come face to face with the rhino-like Judoon

Investigative journalist Sarah Jane Smith, one-time companion to The Doctor, is back for a third series of alien-busting adventures, from creator Russell T Davies, which also features a special appearance from The Doctor himself, David Tennant, who stars in two episodes.

Sarah Jane is accompanied by her adopted son, Luke, his streetwise pal, Clyde Langer, their schoolmate, Rani, who lives opposite and has aspirations to become a journalist like Sarah Jane, and their Xylok super computer in the attic, Mr Smith. Sarah Jane's robot dog, K-9, also joins the gang on their adventures.

In the first of this two-part adventure, Sarah Jane and the gang face the most dangerous day of their lives, as the rhino-like Judoon return. When prisoner Androvax the Destroyer crash-lands on Earth, a Veil is set free and starts to turn Earth's technology against itself. And his next intended victim is Sarah Jane.

As the Judoon fleet approaches Earth, it's a race against time to stop Androvax. But with Genetech's technology on the rampage, and Rani's parents taken prisoner, can anything stop the Army of the Infinitesimal?

Rani investigates strange rumours about a demon living in a funfair at the seaside. What she finds there, however, is far more alarming than that and she makes a decision that affects not only her future, but also the futures of all those she cares about...

Far in the future, in 2059, an old Rani remembers the day when her whole life went wrong. As her younger self investigates mysterious disappearances at an abandoned funfair, she sets into motion a chain of events which unleash the terrible powers of the alien Eve.

Alien Eve's powers grow out of control, with everyone caught in her sinister and endless games. As the echoes of an ancient war threaten the modern world, the danger extends all the way to the year 2059. If Rani fails to change her own destiny, then everyone is doomed.

Sarah Jane Smith is played by Elisabeth Sladen and Rani by Anjli Mohindra.

The Doctor makes a spectacular return on the happiest day of Sarah Jane's life but a deadly trap is awaiting them all. As the strands of a clever and careful plan come together, can even a Time Lord save Sarah Jane on the day of her arch-enemy's greatest triumph? 

The Doctor joins the battle, as the power of the Pantheon Of Discord grows in strength, in the second and concluding part of this week's story, but a deadly trap is waiting for them all. The Doctor makes a spectacular return but is he too late to save both his old companion and Earth itself? As the strands of a clever and careful plan draw together, the two friends are separated across different time zones and must fight to save each other. For one, there's a terrible price to pay. 

A haunted house, with mysterious whispers and secrets in the shadows attracts Sarah Jane's attention in the first of a new, two-part adventure, written by Phil Ford and directed by Alice Troughton. When Professor Rivers and the gang investigate an old legend, a monstrous creature appears in the night as the terrifying grasp of Erasmus Darkening reaches out from centuries past. 

Sarah Jane and the gang discover the secrets of Erasmus Darkening, in the second and concluding part of The Eternity Trap, but are they too late? As ghosts from the past rise up, and the quest to find the missing children reaches a climax, it seems that nothing can stop the ancient alchemist's rise to victory.

Sarah Jane Smith is played by Elisabeth Sladen, Professor Rivers by Floella Benjamin and Erasmus Darkening by Donald Sumpter. The Sarah Jane Adventures also stars Daniel Anthony as Clyde Langer, Anjili Mohindra as Rani Chandra, Callum Blue as Lord Marchwood, Adam Gillen as Toby Silverman, Amelia Clarkson as Elizabeth Marchwood, Rhys Gear as Joseph Marchwood and Tony Boncza as Mr Scriven. 

Strange forces bring the Mona Lisa to life, as the adventure series starring Elisabeth Sladen continues. Clyde's proudest day turns into a nightmare when he discovers that fine art can be dangerous and, when a school trip descends into disaster, the gang find themselves trapped without Sarah Jane's help, as the awesome abomination stirs. 

Luke and Rani investigate the myth of the dreaded abomination, as the two-part drama concludes. With Sarah Jane trapped and beyond help, everything now depends upon Clyde. Mona Lisa vows to release her terrifying brother from his age-old prison, but only Clyde has the key.

Sarah Jane Smith is played by Elisabeth Sladen, Mona Lisa by Suranne Jones and Clyde by Daniel Anthony. This episode of The Sarah Jane Adventures also stars Tommy Knight as Luke Smith, Anjili Mohindra as Rani Chandra, Alexander Armstrong as Mr Smith, John Leeson as the voice of K9, Ace Bhatti as Haresh Chandra, Jeff Rawle as Mr Harding, Liza Sadovy as Miss Trupp, Lizo Mzimba as Lizo and Paul Kasey as The Highwayman. 

Sarah Jane, Luke, Clyde and Rani face an old enemy, the green Slitheen, in the penultimate episode of this series of The Sarah Jane Adventures. When the Slitheen's latest scheme is halted, their rivals, the Blathereen, arrive. Declaring peace between the planets, they offer Sarah Jane a gift – one that might change the future of the human race forever. When the Blathereens' gift runs riot, Sarah Jane faces the battle of her life to save her son, Luke, as The Sarah Jane Adventures concludes. With Clyde, Rani and K9 trapped in a school under siege, and the whole of London convulsing under the alien threat, everything heads for a final showdown in the attic – and not everyone is getting out alive.

Sarah Jane Smith is played by Elisabeth Sladen, Luke Smith by Tommy Knight, Clyde Langer by Daniel Anthony and Rani Chandra by Anjli Mohindra. John Leeson provides the voice of K9.