Song of the Executioner (S03E14)

In the 1600s, MacLeod took refuge in a monastery established by Paul, another Immortal. There, he met Kalas, an Immortal monk known for his incredible singing voice. When MacLeod learned that Kalas was killing other Immortals as they left the sanctuary, he and Paul expelled him, cutting him off from the music he loved. Fast forward to the present, Paul and his choir have ventured out for a concert tour, but after one performance, Paul mysteriously vanishes. MacLeod soon realizes Kalas is seeking revenge. Meanwhile, Anne faces scrutiny as two suspicious hospital deaths are traced back to her. With drugs discovered in Joe's bar, it becomes clear Kalas is targeting MacLeod’s friends. In a fierce confrontation, MacLeod finds Kalas to be a formidable opponent, pushing him to the brink. To save himself, MacLeod leaps off the concert hall roof.