Sarah Jane and the gang embark on another exciting new adventure this week as the children's drama series, produced by Russell T Davies, continues.
When Sarah Jane returns a boy who has slipped through a time fissure back to 1951, she realises she has found a way to meet the parents she never knew. But is it a trap? Sarah Jane and Luke fall victim to a revenge plot by The Trickster.
Sarah Jane Smith is played by Elisabeth Sladen and Luke by Thomas Knight.
Clyde and Rani, trapped in a devastated alternative world with the survivors of mankind, make a desperate bargain with The Graske, in the concluding part of this two-episode adventure.
Then Rani travels to 1951 to help Sarah Jane, who has been reunited with her long-lost parents. Sarah Jane needs to defeat the Trickster - but will the price she has to pay be too high?
Clyde is played by Daniel Anthony, Rani by Anjil Mohindra and Sarah Jane Smith by Elisabeth Sladen.