Bonanza (1959)

S5E31 The Dark Past

Title: Shadows of the Past Plot: Dev Farnum, a brooding bounty hunter, arrives at the Ponderosa, seeking vengeance on a man whose wife is currently sheltered by the Cartwright family. Tensions rise as the Cartwrights are caught in the crossfire, torn between protecting the woman and confronting the relentless hunter determined to settle his score.