Perfect...

SELECT * FROM gallery2 WHERE topic_id="121697" UNION SELECT * FROM gallery2 WHERE topic_id="102141" UNION SELECT * FROM gallery2 WHERE topic_id="1148353" UNION SELECT * FROM gallery2 WHERE topic_id="1726738" UNION SELECT * FROM gallery2 WHERE topic_id="1033402" UNION SELECT * FROM gallery2 WHERE topic_id="1291419" UNION SELECT * FROM gallery2 WHERE topic_id="1778441" UNION SELECT * FROM gallery2 WHERE topic_id="240803" UNION SELECT * FROM gallery2 WHERE topic_id="382147" UNION SELECT * FROM gallery2 WHERE topic_id="1371738" UNION SELECT * FROM gallery2 WHERE topic_id="682943" UNION SELECT * FROM gallery2 WHERE topic_id="23674" UNION SELECT * FROM gallery2 WHERE topic_id="289113" UNION SELECT * FROM gallery2 WHERE topic_id="1109842" UNION SELECT * FROM gallery2 WHERE topic_id="1288707" UNION SELECT * FROM gallery2 WHERE topic_id="1821865"