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The Three Days Rule | How I Met Your Mother | Slate

The Three Days Rule

Backdrop

How I Met Your Mother

Poster

Rated 8.1 on TMDB

How I Met Your Mother

The Three Days Rule

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.

Aired: 27 Apr 2009
Runtime: 23m

Direction and writing

Greg MalinsWriter

Pamela FrymanDirector

Cast

Josh RadnorTed Mosby
Neil Patrick HarrisBarney Stinson
Jason SegelMarshall Eriksen

Alyson HanniganLily Aldrin

Cobie SmuldersRobin Scherbatsky

Kevin Michael RichardsonStan

Rebecca BudigHolli

Full cast and crew

Season 4

S4E20Mosbius Designs
S4E21The Three Days Rule
S4E22Right Place, Right Time
S4E23As Fast as She Can

Whole season Every season