Complex sentence: He also recurred on the television show "Stargate SG-1" as "Lord Zipacna" and on "Lost" during its fourth and sixth seasons, in which he played as the antagonist Martin Keamy (Martin Christopher Keamy) for 12 episodes.
Split into simpler sentences: He also recurred on the television show "Stargate SG-1" as "Lord Zipacna". Durand appeared in the hit television show "Lost" during its fourth and sixth seasons, in which he played as the antagonist Martin Keamy (Martin Christopher Keamy) for 12 episodes.