Josh Radnor Ted Mosby Actor Jason Segel Marshall Erikson Actor Neil Patrick Harris Barney Stinson Actor Alyson Hannigan Lily Aldrin Actor Cobie Smulders Robin Sherbatsky Actor Bob Saget Narrator Vicki Lewis Dr. Soya Guest Star Chase Ellison Scott Guest Star Todd Grinnell Insane Duane Guest Star Danielle Weeks Sheila Guest Star Andra Nechita Robin's Son Guest Star Carter Bays Executive Producer Craig Thomas Executive Producer Joe Kelly Writer Pamela Fryman Director