Question: WHAT SERIES WAS RELEASED BY ITV Studios AND A RELEASE DATE OF August 15, 2012?
SQL: SELECT "Series" FROM "2-170661-4" WHERE "Released by" = 'ITV Studios' AND "Release Date" = 'August 15, 2012';

Question: WHAT IS THE EPISODE NUMBER  THAT HAS 28 DVD?
SQL: SELECT "Episode No." FROM "2-170661-4" WHERE "No. of DVDs" = '28';

Question: WHAT EPISODE HAS A REGION NUMBER BIGGER THAN 1, AND 32 DVDS?
SQL: SELECT "Episode No." FROM "2-170661-4" WHERE "Region No." > 1.0 AND "No. of DVDs" = '32';