Watch How I Met Your Mother Season 4 Episode 20 online via TV Fanatic with over 6 options to watch the How I Met Your Mother S4E20 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, Google Play, and Verizon On Demand.
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Ted starts his own architecture firm and hires an intern to get things started, but the intern gets too close with members of the gang.