Double trouble

SELECT * FROM gallery2 WHERE topic_id="420875" UNION SELECT * FROM gallery2 WHERE topic_id="1758515" UNION SELECT * FROM gallery2 WHERE topic_id="1613662" UNION SELECT * FROM gallery2 WHERE topic_id="697919" UNION SELECT * FROM gallery2 WHERE topic_id="89752" UNION SELECT * FROM gallery2 WHERE topic_id="826264" UNION SELECT * FROM gallery2 WHERE topic_id="1603171" UNION SELECT * FROM gallery2 WHERE topic_id="357940" UNION SELECT * FROM gallery2 WHERE topic_id="1142184" UNION SELECT * FROM gallery2 WHERE topic_id="1393968" UNION SELECT * FROM gallery2 WHERE topic_id="1462915" UNION SELECT * FROM gallery2 WHERE topic_id="1024787" UNION SELECT * FROM gallery2 WHERE topic_id="1185036" UNION SELECT * FROM gallery2 WHERE topic_id="946450" UNION SELECT * FROM gallery2 WHERE topic_id="562151" UNION SELECT * FROM gallery2 WHERE topic_id="491892"