In Season 6, when Marshall's father passes away, Jason Segel wasn't told about this change in the script and his reaction to this news was very real and moving.
Plus if you watch the episode from the start, there is a countdown to the moment with various numbers on books, beer and anything you can think of.
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Things You Didn't Know About HIMYM
FanfictionHere are some mind-blowing facts that you probably didn't know about the show How I Met Your Mother.
