When the gang helps Barney's mother move, they learn that she has lied to him about events throughout his life. Robin oversells Ted to a blind date.
The news that Marshall and Lily have a positive reading on their pregnancy test has a profound effect on the gang. Meanwhile, Robin must choose between two very different jobs, Barney is pulled between donating to charity or buying a diamond suit, and Marshall and Lily are thrown into a panic over their impending parenthood.
This season takes place over the course of Barney and Robin’s wedding weekend, when the lives of the gang change dramatically
The residents and interns treat the victims of a massive explosion at an apartment building, while Alex investigates the cause of the accident.