CREATE TABLE table_24877 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT)

Who directed the title 'the razor's edge'?
SELECT "Directed by" FROM table_24877 WHERE "Title" = 'The Razor''s Edge'
SELECT "Directed by" FROM "table_24877" WHERE "Title" = 'The Razor\'s Edge'