The Doctor's Companion: A person who explores time and space with the Doctor, fights enemies with the Doctor, and often has to save the Doctor's life. If it wasn't for the companions, the Doctor probably wouldn't have made it out of so many scrapes. To celebrate the formidable women who have travelled in the TARDIS, dive into four fantastic new adventures with the Doctor, starring Rose, Sarah-Jane, Clara and Bill. Written by Jenny Colgan, Jacqueline Rayner, Dorothy Koomson and Susan Calman, these stories are the perfect way to celebrate the Doctor's fantastic female heroines, for fans of all ages.