How many U.S. viewers were there for the episode written by Lazar Saric & Jed Spingarn?
CREATE TABLE "table1_25246990_5" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "u_s_viewers_millions" text,
  "original_u_s_air_date" text,
  "prod_code" real
);
SELECT "u_s_viewers_millions" FROM "table1_25246990_5" WHERE "written_by"='Lazar Saric & Jed Spingarn';