CREATE TABLE table_4227 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" FLOAT)

What episode number in the season is 'many happy returns'?
SELECT MAX("No. in season") FROM table_4227 WHERE "Title" = 'Many Happy Returns'
SELECT MAX("No. in season") FROM "table_4227" WHERE "Title" = 'Many Happy Returns'