Although this episode is the first to take entire place at the Venture Compound, it is not isolated from the outside world. To the contrary, we are introduced to Dr. Orpheus' daughter Triana, who, other than having a necromancer for a dad and affecting a goth fashion sense, is the first 'normal' person to appear on the show (to be explicit, she goes to public school and has a life outside of the compound). By comparison, previous episodes have only featured the 'normal' kind of people you would find in strip clubs ('Mid-Life Chrysalis') or Tijuana ('Dia de los Dangerous'), or have featured no ordinary people at all (i.e. astronauts Buzz Manstrong and Anna Baldavich in 'Careers in Science'). And they certainly have not featured anyone who could be conceived as a peer of Dean or Hank.