CREATE TABLE table_19860361_3 (yogi_bear VARCHAR, air_date VARCHAR)

What is the Yogi Bear that aired on 1959.12.21?
SELECT yogi_bear FROM table_19860361_3 WHERE air_date = "1959.12.21"
SELECT "yogi_bear" FROM "table_19860361_3" WHERE "1959.12.21" = "air_date"