 Emily also develops a good friendship with JJ, becoming close confidantes to one another.Other characters include Klariza Clayton as Karen McClair, Freddie's older sister, who is desperate to become famous, Mackenzie Crook as Johnny White, a psychotic Bristol gangster, with comedians Jordan Long and Justin Edwards as his inept henchmen, and Ardal O'Hanlon as the gang's careless college tutor, Kieran MacFoeinaiugh (pronounced Mac-Phew).Chris Addison appears as Roundview College's new headmaster, David Blood, Will Young as a school counsellor, Pauline Quirke as the detective investigating Sophia's suicide, and Georgia Henshaw as Lara, JJ's new girlfriend.