When a girl called Ali pockets a silver orb that falls from the sky, little does she realise it's her ticket to seeing the universe! Desperate to retrieve the mysterious object, the Ninth Doctor agrees to let her join him on a dangerous trip to ancient Babylon. Together they must join forces to stop a giant Starman from destroying Earth before it's too late!
to be added
- Ninth Doctor
- Ali's dad
- Ali's mum
- Rose Tyler
- Mickey Smith
- The Doctor mentions some of his previous companions; Susan, Barbara, Ian, Prince Egon, Jamie, Polly, Ella McBrien, Sarah Jane Smith and Leela. Egon and Ella are new companions referenced for the first time in this story; it is not known which Doctor they travelled with.
- The Doctor talks to the Exalted Holgoroth of All Tagkhanastria, pretending to be an emissary from the Crab Nebula.
- Karkinians come from Karkinos.
- Ali learnt about the TARDIS and the Time Lords at college. She was taught they were an ancient and extinct race.
- The Doctor compares Ali's good observation skills to Sherlock Holmes. She does not know who he is.
- Gurgurum mentions the conquests of Eshunna, Elam, Larsa, and Mari as examples of Babylon's might.
- The Tigris and Euphrates rivers make up the borders of Babylon.
- The soil of Babylon is fertile, allowing lots of fruit trees, date palms, and fields of wheat to grow there.
- The Doctor describes humans and meerkats as the only two "halfway sentient" creatures on Earth circa 2005.
- This is one of only three of the eShorts (the others being Spore and Lights Out) in which the Doctor is not depicted as travelling with one of his TV companions. It is also one of the earliest depictions of the Ninth Doctor in an adventure with a non-TV companion, though neither the first nor the last — other examples include What I Did on My Christmas Holidays by Sally Sparrow from the 2006 Doctor Who Annual, and the Doctor Who: The Ninth Doctor comic series, which introduced original-to-comics companion Tara Mishra.
- The final chapter retells the final scene from Rose, but from the Doctor's perspective.
- An audiobook of the story was read by its author, Charlie Higson.
- The Doctor mentions that he once had a hand similar to that of a crab, in a body "far far away". (PROSE: A Big Hand for the Doctor)
- The Doctor mentions the events of TV: Rose and goes back to visit Rose at the end of the story. This entire story is set within the events of Rose, just prior to his returning to pick Rose up at the end of the episode.
- A Starman's physical appearance depends on the lifeforms it absorbs when feeding on their planets. The Krillitane also have this biological trait. (TV: School Reunion)
- The Doctor says he is only a warrior if he has to be. (TV: The Night of the Doctor)