"Dr. Horrible's Sing-Along Blog" Cast
"Dr. Horrible's Sing-Along Blog" cast
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Felicia Day
Penny
Neil Patrick Harris
Billy / Dr. Horrible
Nathan Fillion
Captain Hammer
Jed Whedon
Maurissa Tancharoen
Richard Partlow
Simon Helberg
Stacy Harbert
Marti Noxon
Douglas Petrie