How I Met Your Mother2005

Barney:
[Anna is reading Barney's letter] Dear Resident,

Barney:
The time we spent together, however long it was, meant the world to me. I would love to see you again, but unfortunately I cannot. You see, I... am a ghost. I can only materialize once every decade, on the anniversary of my death. I chose to spend my one day among the living with you, sweet Resident. Perhaps we will meet again in another decade, provided you keep your figure. Until then, all my love from the beyond. Barney

Anna:
[Barney said his name was Ted Mosby] Barney? Who the hell is Barney?