Season 1, Episode 2: Purple Giraffe
After telling Robin that “He loves her”, things fall apart for she and Ted and he figures that it’s all over for the two of them, but not for long as Ted finds out from Lily after she met Robin that she (Robin) likes him and Ted tries once again to win her affections, by throwing a party at his and Marshall’s place, but it turns into 3 parties in 3 nights, when Robin was a no show for the first 2. Meanwhile, after Lily said yes to Marshall’s marriage proposal, she has become extra affectionate to him in the bedroom and Marshall is worrying about finishing a huge paper to write for law school, that is due soon.