In Inside the mind of a killer, serial murderer Brian Wicklow (Matthew Kelly) likes to play mind games with the authorities. But after 15 years behind bars, the authorities are losing interest, if not patience. Wicklow decides to regain the authorities' interest (and his own flagging notoriety) by saying he'll talk about where he buried his youngest victim - but only to policewoman and investigator Eve Granger (Jemma Redgrave).

In The killer is out revenge, Wicklow can't believe Granger could have figured out his secret on her own, and he intends to find out how she did so, even if he must become the prime suspect in the murder of a fellow inmate to get the attention of the authorities again.