The Battle of Kembleford (S12E01)

Father Brown delves into a mysterious murder that takes place during a medieval battle re-enactment. As tensions rise and the atmosphere becomes charged, he seeks to uncover the truth behind the shocking crime that has disrupted the event. With his keen intuition and understanding of human nature, Father Brown unravels the secrets hidden within the reenactors' ranks, piecing together clues that lead him closer to the culprit.