CREATE TABLE table_48190 ("Release Title" TEXT, "Series" TEXT, "No. of DVDs" TEXT, "No. of Blu-ray Discs" TEXT, "Release Date" TEXT, "Episode No." TEXT, "Region No." FLOAT, "Released by" TEXT)

WHAT IS THE EPISODE NUMBER THAT HAS 28 DVD?
SELECT "Episode No." FROM table_48190 WHERE "No. of DVDs" = '28'
SELECT "Episode No." FROM "table_48190" WHERE "No. of DVDs" = '28'