Brain Trafficking (webcast), because that's the name of the YouTube video.
Talk about it here.
The Prequel to A Good Man Goes to War was the third prequel produced by the BBC for the sixth series of Doctor Who. It marked the debut of the Headless Monks and saw the reappearance of Simon Fisher-Becker as Dorium Maldovar.
Dorium meets three cloaked figures, informing them that his agents have procured the exact security software they have requested. Dorium has extracted it from the memory of a Judoon trooper, admitting he decided that it was quicker to take the whole brain. He gives them the brain in exchange for a bag of sentient money. Dorium doesn't understand why they are doing all this to imprison one child, and says he's heard rumours about whose child they've taken. He asks if they are mad and if they've heard the stories about the Doctor. Dorium warns them "God help us if you've made him angry".
- Dorium mentions that he took a Judoon trooper's brain in order to extract his memories. The brain is in a palm-sized box. He says that the monks will find the software in the frontal lobe.
- Dorium is paid in sentient money. He says he loves how it wriggles.
- This is a prelude to A Good Man Goes to War. It is acknowledged within the story twice, first when Dorium tells Colonel Manton in the Maldovarium that the Headless Monks are old customers of his, explaining how he knows the location of Demons Run, and second when hacking into their security software on Demons Run, noting to the Eleventh Doctor that he sold it to them. His acquaintance with the Headless Monks leads to him approaching them to prevent a fight, resulting in his beheading.
- It is recommended by the BBC website that viewers watch The Almost People before seeing the prequel.