The first-season episodes were not aired in the order intended by the show's creators. This is suggested by the episodes' production numbers, which are displayed on the Sci-Fi channel's Eureka website next to episode titles quite often. There are some small inconsistencies when watched closely, but such inconsistencies are minimal and were intentionally controlled. In podcast commentaries with the show's creators and star Colin Ferguson, they confirm that the production order is in fact the order they intended the show to air, but the network executives changed the order to try and place stronger episodes earlier in the run as to help attract viewers. As such, the creators were able to make minor changes in editing and sometimes ADR dialogue in later episodes (such as removing the explicit mention of Zoe's first day at school) to try to eliminate audience confusion.
There was considerable actor crossover between "Warehouse 13" and "Eureka'. Not only did Allison Scagliotti appear on Eureka as her Warehouse 13 'Claudia Donovan' character but Neil Grayston appeared on Warehouse 13 as his Eureka "Douglas Fargo' character. In addition Erica Cerra (Eureka's Jo Lupo), Joe Morton (Eureka's Henry Deacon) and Niall Matter (Eureka's Zane Donovan) appeared on Warehouse 13 as other characters. Cerra and Matter were husband and wife con artists and Morton was a prison preacher. Likewise Saul Rubinek (Warehouse 13's "Artie") appeared on "Eureka" as Dr. Carl Carlson.
In season 2, episode13, Taggert says "You want every single second", while thinking they are going into a hoard of zombies in the morgue. Matt Frewer, the actor that plays Taggert, starred in the 2004 remake of Dawn of the Dead, where he utters his dying words, "You want every single second."
Many of the small futuristic cars, such as the one loaned by Beverly Barlowe to Jack Carter in the pilot episode, were electric vehicles produced by a Canadian company called Dynasty IT. The cars came in several different versions, including sedan, coupe, pickup, and open-topped versions. Other futuristic-looking cars used in the show included the Smart Fortwo and AEV Kurrent, another electric microcar that used to be produced in Michigan. The Dynasty line has since been sold to a company in Pakistan.
Despite retaining the persona of a somewhat immature geek, Fargo's personality and overall character changes slightly from the pilot to the rest of the series. In the pilot, he's a bit of a snide, sardonic, devious character, playing assistant/henchman to the scheming and disingenuous Professor Warren King. Throughout the remainder of the series, he transitions to being a much more benign, well-meaning, albeit clumsy and bumbling comedic character.