Louise is troubled by Frank’s growing isolation, financial problems and movement toward extremist politics. As police intelligence struggles to keep pace with threats against protesters and migrants, Louise is drawn into anti-extremist work and a hate-crime investigation. Frank’s failed legal case leaves him vulnerable to recruitment, while Tony’s attempt to help him financially deepens tensions within the family. The episode culminates in violence near O’Connell Bridge, where Louise helps Musa escape through the flames.