The TARDIS materialises on Dame Kelly Holmes Close on the day of the opening ceremony of the 2012 Olympic Games. On the street, concern is divided between preparation for the Games, as the torchbearer on the final leg, and the continued disappearance of children from their gardens. Cars break down on the street, something which a council worker, Kel, states have been happening all day.
The source of the problems is a small girl, Chloe, who is able to cause people to disappear by drawing them. The Doctor is able to deduce from detection of residual energy and the carbon nature of a scribble that had attacked Rose that the problem is coming from an alien influence.
Intrigued, the Doctor investigates and through talking to Chloe, he discovers that the disappearance is related to the Isolus, an alien life-form, who had befriended Chloe as she had a troubled childhood including an abusive father. The Doctor warns that the Isolus is desperate for love too, and will use the billions of people watching Olympic opening ceremony to renumber its family.
The Doctor returns to the TARDIS, which locates the Isolus pod to the Close. However, the Doctor and thousands at the Olympic Stadium start to disappear, leaving Rose to dig the pod up (to Kel's protestations). Rose realises that she needs to offer the pod heat, which she does by throwing the pod towards the torch, which had subsequently became a moral beacon, that is passing the Close.
As the missing children start to reappear, Rose realises that so will the demon-like drawing that Chloe had made of her father. Rose and Chloe's mother are able, though, to calm Chloe enough to destroy him.
As the torch-bearer approaches the Olympic Stadium, he staggers, but the Doctor completes the run and lights the Olympic Flame, allowing the Isolus to return home.
As the Doctor and Rose walk off to watch the Games, Rose remarks that however hard they attempt, nothing will ever split the two of them up. However, the Doctor does not seem so sure, as he surmises that a storm is approaching.
Doctor David Tennant (Tenth Doctor)
Companion Billie Piper (Rose Tyler)
Nina Sosanya – Trish
Abisola Agbaje – Chloe
Edna Doré – Maeve
Tim Faraday – Tom's Dad
Abdul Salis – Kel
Richard Nichols – Driver
Erica Eirian – Neighbour
Stephen Marzella – Police Officer
Huw Edwards – Commentator
Writer Matthew Graham
Director Euros Lyn
Script editor Simon Winstone
Producer Phil Collinson
Executive producer(s) Russell T. Davies
Series Series 2
Length 45 minutes
Originally broadcast 24 June 2006