Doctor Who: The Ninth Doctor Volume 4: Sin Eaters

"The Doctor goes undercover at a prisoner rehabilitation facility held within a collapsing singularity--a place where the scientists claim to 'cure' murderers and psychopaths by removing all of their negative emotions. But the Doctor's dark side, and Time Lord physiology, give birth to a horrendously real 'id' that rampages through the station. Has the Doctor's carefree approach to planning finally met a threat that he can't charm or think [his] way out of?"--Amazon.com.