CREATE TABLE "table1_2113721_7" (
  "dvd_name" text,
  "episodes" real,
  "region_1" text,
  "region_2" text,
  "region_4" text
);

Question: What is the smallest number of episodes in a season?
SQL: SELECT MIN("episodes") FROM "table1_2113721_7";

Question: When was Season Three premiered in region 2?
SQL: SELECT "region_2" FROM "table1_2113721_7" WHERE "dvd_name"='Season Three';