Prodigal Son - S2.E20

Richie returns, on the run, turning to MacLeod for help. An Immortal has been following him, refusing to confront him, but committing grisly murders wherever Richie goes. Richie is arrested for the murders. Mac learns that Immortal hunter Martin Hyde is behind the murders: considering the Quickening of a green Immortal like Richie not worth the taking, Hyde has been hounding him in order to drive him to his teacher. MacLeod must clear Richie of the murders and defeat the evil Immortal.