What are the episode numbers where the episode features Jack & Locke?
CREATE TABLE "table1_11562149_1" (
  "no_in_series" text,
  "no_in_season" text,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "featured_character_s" text,
  "original_air_date" text,
  "u_s_viewers_million" text
);
SELECT "no_in_series" FROM "table1_11562149_1" WHERE "featured_character_s"='Jack & Locke';