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 Ron Nicolosi Mike Guest Star Collette Wolfe Sarah Guest Star E.E. Bell Walter Guest Star Matt L. Jones Arthur Guest Star Celeste Thorton Lisa Guest Star Collin Christopher Simon Guest Star John Dore Mugger, Zoo Keeper Guest Star Carter Bays Executive Producer Craig Thomas Executive Producer Stephen Lloyd Writer Pamela Fryman Director