What is the lowest nightly rank for an episode after episode 1 with a rating/share of 2.6/8?
CREATE TABLE "the_biggest_loser_u_s_tv_series" (
  "episode" real,
  "rating" real,
  "share" real,
  "rating_share_18_49" text,
  "rank_timeslot" real,
  "rank_night" real
);
SELECT MIN("rank_night") FROM "the_biggest_loser_u_s_tv_series" WHERE "rating_share_18_49"='2.6/8' AND "episode">1;