The Sarah Jane Adventures: Sky, Part One

The Sarah Jane Adventures returns for its final series today with the first part of Sky which is written by Phil Ford.

Alien investigator Sarah Jane Smith is back on CBBC with a fifth and final series of the award-winning The Sarah Jane Adventures, starring the late Elisabeth Sladen.

Created by Russell T Davies, the hugely successful Doctor Who spin-off returns for a brand-new, six-part series, featuring three stories, each told over two episodes. The first is the spectacular two-part story, Sky.

In today's episode, Sarah Jane finds a baby girl on her doorstep and tries to find out who abandoned her.

At a nearby nuclear power station, a beautiful woman appears out of thin air and uses alien powers to take control. She's looking for something – and realises that Sarah Jane may just have it...

The episode will be broadcast today at 5.15pm on CBBC and will be available on the BBC iPlayer shortly following transmission. Part two will be shown tomorrow.