CREATE TABLE table_28754 ("Episode number  ( Production number ) " CLOB, "Title" CLOB, "Original air date" CLOB, "Total viewers on FX" CLOB, "Total viewers on FX+" CLOB, "Total viewers" CLOB, "Rank on channel" CLOB)

Name the rank on channel for january 21, 2011
SELECT "Rank on channel" FROM table_28754 WHERE "Original air date" = 'January 21, 2011'
SELECT "Rank on channel" FROM "table_28754" WHERE "Original air date" = 'January 21, 2011'