Barney and Robin got back together after Barney screwed up their date. According to related videos and TV series, Barney and Robin are the characters in The Romance of Mom and Dad. They broke up because of discord. In the last episode of the fourth season, Robin later fell in love with a 4-point man. Barney couldn't take it anymore and came up with some bad ideas to screw up Robin's date. Then Robin asked Barney what happened, and Barney really confessed. Barney and Robin are back together.