Josh Radnor Ted Mosby Actor Jason Segel Marshall Erikson Actor Alyson Hannigan Lily Aldrin Actor Neil Patrick Harris Barney Stinson Actor Cobie Smulders Robin Sherbatsky Actor Bob Saget Narrator Bryan Cranston Hammond Druthers Guest Star Joe Nieves Carl Guest Star Preston Bailey Kindergartner Guest Star William Schallert Brady Guest Star Thomas Anthony Man Guest Star Ewan Chung Carol Guest Star Ben Tolpin Mark Guest Star Carter Bays Executive Producer Craig Thomas Executive Producer Rob Greenberg Director Matt Kuhn Writer