All the officers are ordered to undergo drug tests as well as the prisoners, leaving Colin in a tight spot. The results of the drug tests concern Neil but not for the reason you'd expect! Natalie Buxton returns to G-Wing having been convicted of child prostitution, but has to cope with Frances, who is incensed at Natalie's return to Larkhall. Will Natalie be able to use her cunning and manipulative skills to win over the inmates?