The warehouse is getting an upgrade to its aging computer system; unfortunately, a virus is released that shuts down the warehouse. It was a virus placed there by Hugo Miller, the original designer of the warehouse. A holograph, Hugo One, soon appears and his computer program controls all aspects of the warehouse. Pete and Myka go to the mental institution to get the real Hugo and bring him back to the warehouse. Only half of Hugo's brain is working and he is very childlike (wonderfully portrayed by Auberjonais). Artie verbally spars with Hugo One and figures out a way to outwit him. The guest appearance of the Eureka character Douglas Fargo was a fun plot addition. A very entertaining episode.
