You can now watch the entire How I Met Your Mother Season 4 Episode 21 movie online in high-definition quality, complete with English subtitles for a better viewing experience. Best of all, there’s no need to download anything—simply stream it directly from your device anytime, anywhere.
When Ted violates the 'three days rule' by continually texting with a girl he's just met, Barney and Marshall retaliate by impersonating her.