Kids, these are the dark truths about How I Met Your Mother. For this list, well be looking at some of the reported behind the scenes facts about the sitcom, its cast, and its legacy. Our countdown includes three failed spin-offs, Josh Radnors dog allergy, Josh Radnors dog allergy, and more! Did any of these dark truths shock YOU? Let us know in the comments!

Watch more great HIMYM videos here:
The Funniest Moment in Every Season of How I Met Your Mother - https://youtu.be/xtBQVsG8J1c
All the How I Met Your Mother Seasons: RANKED! - https://youtu.be/k1QwlupRNpQ
Top 10 How I Met Your Mother Jokes That Will NEVER Get Old - https://youtu.be/VtjudRcsrLY

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