Lawman (1958)

S1E3 The Joker

Dan and Johnny are on the hunt for a prisoner when the captive reveals to Johnny that he is his father. This revelation leaves Dan stunned as Johnny decides to resign, claiming he has a troubled lineage that disqualifies him from being a good lawman. The episode culminates in a tense gunfight between Dan, Johnny, and the prisoner, ultimately leading Johnny to reclaim his badge and his commitment to the law.