Season 9 Episode 10 episode 10

How I Met Your Mother Season 9 Episode 10 Spoilers: Mystery-Inducing Title Revealed!

How I Met Your Mother Season 9 Episode 10 Spoilers: Mystery-Inducing Title Revealed!

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There's going to be a 'Major Mystery' during How I Met Your Mother, season 9 episode 10.

Well that is at least what the season 9, episode 10 title hints at as the episode will be titled "Major Mystery".

Source: TVRage

What could this 'Major Mystery' be about? Or could the tile have nothing major to do with the episode at all?