Alyson Hannigan Photo

From: Photo Flash: First Look - HOW I MET YOUR MOTHER's Season Finale, Airing 5/13

On How I Met Your Mother's season finale, titled 'Something New,' as the gang prepares to go to Robin and Barney's wedding, Ted invites Lily to see the house he's finally finished fixing up. Meanwhile, Robin and Barney's night of relaxation is ruined by an obnoxious couple (Casey Wilson and Keegan-Michael Key), and Marshall takes the baby on a last-minute trip to Minnesota to see his family.