CREATE TABLE table_57908 ("Year" FLOAT, "Title" CLOB, "Original channel" CLOB, "Role" CLOB, "Note" CLOB)

what is the original channel when the note is co-star in year 2012?
SELECT "Original channel" FROM table_57908 WHERE "Note" = 'co-star' AND "Year" = '2012'
SELECT "Original channel" FROM "table_57908" WHERE "Note" = 'co-star' AND "Year" = '2012'