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.
The episode concludes several long-running storylines as the ceremony begins: [S9E22] The End of the Aisle
: Barney witnesses Marshall and Lily’s messy, honest life and decides on a single vow: to always be honest with Robin. He immediately confesses that Ted was the one who found the locket. Marshall and Lily’s Real-Life Vows As the wedding approaches, Robin experiences a severe
: Just as Barney has a last-second panic attack at the altar, Marshall delivers the eighth and final slap of the Slap Bet , officially ending the years-long gag. He immediately confesses that Ted was the one
: Ted reveals he retrieved the locket from Central Park Lake but gives it to Barney so Robin will believe it came from her groom.