List of How I Met Your Mother characters
The main characters are: Ted Mosby, a romantic searching for "The One"; Barney Stinson, a womanizer; Robin Scherbatsky, a journalist who moved to New York in 2005; and Marshall Eriksen and Lily Aldrin, a long-term couple. Although the show is based around The Mother, her first appearance is not until the season eight finale.
David Burtka
Burtka appeared in seven episodes of "How I Met Your Mother;" in all seven such installments, he acted out "Scooter," the former high school boyfriend of Lily (Alyson Hannigan), who still had not gotten over their breakup. Burtka made a cameo appearance, in "A Very Harold & Kumar 3D Christmas," as himself; in it, he also shared a scene with Neil Patrick Harris, in a part that was much like his character from "How I Met Your Mother."