Sean Six has: Played Buck Francisco in "Alien Nation" in 1989. Played Buck Francisco in "Alien Nation: Dark Horizon" in 1994. Played Buck Francisco in "Alien Nation: Body and Soul" in 1995. Played Buck Francisco in "Alien Nation: The Enemy Within" in 1996. Played Buck Francisco in "Alien Nation: Millennium" in 1996. Played Buck Francisco in "Alien Nation: The Udara Legacy" in 1997.