War and Peace

S1 E21: Amanda fights Immortal Sean (Benedick Bates) when they are interrupted. Liam remembers how he fought on the British side in the American Revolutionary War, while Sean was on the American side. Liam killed Sean in battle. Liam vowed to become a priest if Sean's stepmother survived her injuries. She died, but Amanda lied to Liam about it. In the present, Liam offers his head to Sean, who relents.