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Symphony of Illumination is the twelfth episode of the seventh season of How I Met Your Mother, and the one hundred forty-eighth episode overall.
Josh Radnor (Ted Mosby),
Jason Segel (Marshall Eriksen),
Cobie Smulders (Robin Scherbatsky)
Neil Patrick Harris (Barney Stinson)
Alyson Hannigan (Lily Aldrin)
Vicki Lewis (Dr. Sonya),
Chase Ellison (Scott),
Todd Grinnell (Insane Duane),
Danielle Weeks (Sheila)
Andra Nechita (Robin's Daughter),
Noah Schnacky (Robin's Daughter)
Behind the Scenes