CREATE TABLE table_20545 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written By" TEXT, "Originalairdate" TEXT, "TV Broadcast" TEXT)

Which title was No. 4 in season?
SELECT "Title" FROM table_20545 WHERE "No. in season" = '4'
SELECT "Title" FROM "table_20545" WHERE "No. in season" = '4'