CREATE TABLE table_17757 ("No." FLOAT, "#" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Bens location" CLOB, "Original air date" CLOB, "U.S. viewers  ( million ) " CLOB)

What's the number of the episode directed by Tucker Gates?
SELECT "No." FROM table_17757 WHERE "Directed by" = 'Tucker Gates'
SELECT "No." FROM "table_17757" WHERE "Directed by" = 'Tucker Gates'