S4·E21 The Three Days Rule
Core
Aired April 27, 2009
Narrative Classification: Character-defining development exploring origin backstory and emotional depth.
Synopsis
Ted breaks one of Barney and Marshall's relationship rules, texting a woman he recently met, so the pair play a joke on Ted by pretending to be the woman.
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Frequently Asked Questions
When did Season 4 Episode 21 of How I Met Your Mother air?
Season 4, Episode 21 ('The Three Days Rule') originally aired on April 27, 2009.
How long is Season 4 Episode 21 ('The Three Days Rule')?
The episode follows the standard broadcast runtime for How I Met Your Mother.
What happens in How I Met Your Mother Season 4 Episode 21?
Ted breaks one of Barney and Marshall's relationship rules, texting a woman he recently met, so the pair play a joke on Ted by pretending to be the woman....