CREATE TABLE table_20886 ("Episode #" TEXT, "Original airdate  ( UK ) " TEXT, "Episode title" TEXT, "Doctor Who episode" TEXT, "Webcast link" TEXT)

What episode number is the episode 'bringing back the doctor'?
SELECT "Episode #" FROM table_20886 WHERE "Episode title" = 'Bringing Back the Doctor'
SELECT "Episode #" FROM "table_20886" WHERE "Episode title" = 'Bringing Back the Doctor'