WriterTahsin Güner
DirectorJo Hallows
Research stateExpanded case file
Spoiler-light premise
Father Brown helps Gerald Firth leave hospital, only for the former cult leader to be accused of murder after rejoining the Church of Apollo.
What to watch for
The return to Kalon's locked-room world asks whether apparent repentance is genuine and whether Brown's trust was justified.
Continuity tags
Conservative catalogue links for recurring stories—not a complete cast list.
Episode order and contributor credits: source record ↗