During the Testing Center Scene with Lauren and Andy, Dr. Campbell states that the walls are made with Adamantium, Adamantium is the metal that Wolverine's Skeleton and claws are made of, and Ultrons Outer shell is made out of in some comics.
It is revealed in this episode that Dreamer's, or Beautiful Dreamer (as she is known in the comic book); her full name is "Sonya Simonson". It is significant that they chose that name because, in the comic book we only hear Beautiful Dreamer's name as "Sonya", but the writers of the episode chose the name "Simonson" because it is the last name of Louise Simonson who co-created the character Beautiful Dreamer in the comic book.