: Robin walks down the aisle to an instrumental version of "Sandcastles in the Sand," the song that first sparked her romance with Barney.
In a pivotal series moment, Robin attempts to flee the wedding and literally crashes into The Mother. [S9E22] The End of the Aisle
As the wedding approaches, Robin experiences a severe panic attack. Her anxiety centers on the missing locket, which she views as a sign that she is marrying the wrong man. : Robin walks down the aisle to an
While Barney and Robin prepare for the aisle, Marshall and Lily realize they have broken almost every idealistic vow from their 2007 wedding. They decide to update their vows at the altar to reflect their current life: Her anxiety centers on the missing locket, which
: Ted reveals he retrieved the locket from Central Park Lake but gives it to Barney so Robin will believe it came from her groom.