I was just reading an article about HIMYM on the front page and I quote this:
"When the theory of the Mother's demise firsthitthe internet several years ago, and thenwhen the show all but confirmed it in "45 Days" and"Vesuvius," fans were outraged."
Okay, I looked through the episode list forwards and backwards but could not find any episode titled "45 Days". What are they referring to ??? When/where was this?