When Barney finds a copy of the Canadian kids show Space Teens starring Robin’s alter-ego Robin Sparkles, the gang learns more about Robin’s past as a performer than they expected.

Ted recently fell in love. It all started when Ted's best friend, Marshall, drops the bombshell that he's going to propose to his long-time girlfriend Lily, a kindergarten teacher. At that moment, Ted realizes that he had better get a move on if he hopes to find true love, too. Helping him in his quest is Barney, a friend with endless (sometimes outrageous) opinions, a penchant for suits and a fool-proof way to meet women. When Ted meets Robin, he's sure it's love at first sight -- but destiny may have something else in store.