Dr. Horrible's Sing-Along Blog: Cast Rate: –☹️ Very Bad🙁 Bad😐 Average🙂 Good😃 Excellent🤩 Super! ★ Save Rating✔ Rating Saved! Notify me: –about new episodeabout new seasonabout end of season Subscribe✔ Subscription Saved! Dr. Horrible's Sing-Along Blog Science-Fiction, Comedy, Music 7/15/08 – 7/19/08 GeneralEpisodesCastCharactersGallery Cast See full cast → Neil Patrick Harris as Billy / Dr. Horrible Nathan Fillion as Captain Hammer Felicia Day as Penny
