CREATE TABLE table_28420 ("No." FLOAT, "#" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "U.S. viewers  ( million ) " CLOB, "Rank  ( week ) " CLOB, "Original air date" CLOB, "Production code" CLOB)

What was the title of the episode directed by David Mamet?
SELECT "Title" FROM table_28420 WHERE "Directed by" = 'David Mamet'
SELECT "Title" FROM "table_28420" WHERE "Directed by" = 'David Mamet'