The Doctor’s former companion Sarah Jane Smith (Elisabeth Sladen) returns in this BBC Children’s drama adventure series produced by current Doctor Who supremo Russell T Davies.

Now working as an investigative journalist, Sarah Jane discovers that life back on Earth can be just as mysterious, exciting and dangerous as exploring time and space in the Tardis.

Reports of strange lights around the Tycho Radio Telescope lead Sarah Jane, Luke, Clyde and Maria into a terrifying forest encounter, where Sarah Jane comes face-to-face with her oldest enemy.

Meanwhile Maria wrestles with a huge decision when her dad is offered a new job in America.

Monday 29 September
4.35-5.00pm, BBC One