Ted and his old college girlfriend, Karen (Laura Prepon) sit down to a nice meal as they come back into each others' lives. Ted looks a little less enthusiastic than the beautiful Karen does.
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Ted introduces his old college girlfriend, Karen (guest star Laura Prepon) to the rest of the gang. Lily and Marshall, of course, know her from college and never really liked her.
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A picture of Ted holding his girlfriend at the time, Karen (guest star Laura Prepon) in college. Can you imagine the size of the sandwiches he must have shared with her?
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A picture of Ted hugging his girlfriend, Karen (guest star Laura Prepon) during their old college days as Lily looks on in disgust in this scene from the upcoming episode, "Sorry, Bro"
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How I Met Your Mother Season 4 Episode 16 Quotes

Barney: ...a hug is just like a public dry hump
Marshall: I think you're hugging wrong

I want to eat your brain.. but only if it's organic and grass fed

Marshall [in zombie voice making fun of Karen]