CREATE TABLE table_175980_2 (viewers__in_millions_ VARCHAR(255), ranking VARCHAR(255), timeslot VARCHAR(255))
What is every value for viewers for ranking #51 for the Tuesday 9:00 p.m. timeslot?
    
SQL: SELECT viewers__in_millions_ FROM table_175980_2 WHERE ranking = "#51" AND timeslot = "Tuesday 9:00 p.m."