How I Met Your Mother - Season 4 Episode 21 : The Three Days Rule
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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.
Released: 2005-09-19
Runtime: 00:26:14 minutes
Genre: Comedy
Network: CBS
Stars: Josh Radnor, Neil Patrick Harris, Jason Segel, Alyson Hannigan, Cobie Smulders, Cristin Milioti