How I Met Your Mother Do I Know You? (Season 4, Episode 1)
TV-PG
TV Episode | 22 min | Comedy, Drama, Romance

How I Met Your Mother

Do I Know You? (Season 4, Episode 1)

TV-PG

TV Episode | 22 min | Comedy, Drama, Romance

Ted and Stella get engaged, but Ted soon learns that he doesn't know anything about her. Meanwhile, Barney confesses to Lily that he's in love with Robin

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Cast	+ Add Cast
14 cast members

Name	Known for
Josh Radnor Ted Mosby Ted Mosby See fewer	Liberal Arts (2012)
Jason Segel Marshall Eriksen Marshall Eriksen See fewer	Forgetting Sarah Marshall (2008)
Cobie Smulders Robin Scherbatsky Robin Scherbatsky See fewer	The Avengers (2012)
Neil Patrick Harris Barney Stinson Barney Stinson See fewer	How I Met Your Mother (2005)
Alyson Hannigan Lily Aldrin Lily Aldrin See fewer	Buffy the Vampire Slayer (1997)
Sarah Chalke Stella Zinman Stella Zinman See fewer	Scrubs (2001)
Lyndsy Fonseca Daughter Daughter See fewer	Kick-Ass (2010)
David Henrie Son Son See fewer	Wizards of Waverly Place (2007)
Kyle Archer Mark Johnson Mark Johnson See fewer	How I Met Your Mother (2005)
Heidi Herschbach April (as Heidi Lynne Herschbach) April (as Heidi Lynne Herschbach) See fewer	Yes Man (2008)
Alonza Maxwell Bartender Bartender See fewer	Under the Desert Sun (2009)
Nicole Taylor Sexy Blonde Sexy Blonde See fewer	The Insatiable (2006)
Camila Greenberg Jessica (uncredited) Jessica (uncredited) See fewer	Veep (2012)
Bob Saget Narrator (voice) (uncredited) Narrator (voice) (uncredited) See fewer	Full House (1987)