The Screw (Part Two) : Season 21 Episode 84

Masters manages to work out which of the inmates have contacts on the outside, and soon works out how the next delivery of drugs is going to make its way into the prison, so with the help of Meadows and Sim, arranges a sting to catch the dealers in the act. However, she soon realises that she has been double crossed by Lesley Palmer, who is simply working the situation to her own advantage. Meanwhile, as the investigation into Shanti Das' shooting continues, Nixon tries and gather evidence against prime suspect Dee Winston, and offers Hemmingway's former lover Nick Austin a deal – she will drop all charges of withholding evidence against him if he can get Shanti to talk.