CREATE TABLE table_30087 ("\\u2116" FLOAT, "#" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" CLOB, "U.S. viewers  ( million ) " CLOB)

What episode number had US viewership of 4.87 million?
SELECT "\u2116" FROM table_30087 WHERE "U.S. viewers (million)" = '4.87'
SELECT "\u2116" FROM "table_30087" WHERE "U.S. viewers (million)" = '4.87'