Part 1 of two. In the series premiere, Dr. Weir (Torri Higginson) lobbies Brig. Gen. O'Neill (Richard Dean Anderson) to allow her team to seek the underwater city on a faraway planet despite O'Neill's misgivings about their chances of returning to Earth. Maj. Sheppard: Joe Flanigan. Col. Sumner: Robert Patrick. Teyla: Rachel Luttrell. Daniel Jackson: Michael Shanks.