Ted 's building is launched and Barney reveals his final page in his Playbook -- his final play to get Robin , with a little help from Patrice , after all these weeks , and most importantly , with much help from Ted , after all these years .
Ted 's building is launched and Barney reveals his final page in his Playbook -- his final play to get Robin . 
 Barney and Robin get engaged , with a little help from Patrice , after all these weeks , and most importantly , with much help from Ted , after all these years .