explained afterwards that "I can't remember who said 'Nazis,' but we just somehow ended up with Nazis. Then that didn't even feel like enough, so we decided to make them alien Nazis." Only one scene featuring the Nazis was filmed during the previous episode, "Zero Hour". The intention was to resolve this quickly at the start of the fourth season and avoid a lengthy storyline. Further changes occurred prior to the start of the fourth season; executive producers Braga and Rick Berman both took a step back from the show and brought in Manny Coto as the new showrunner for Enterprise. Coto found that after he got through the Nazi story left over from season three, he would have greater freedom to connect the series to Star Trek: The Original Series. He described that cliffhanger as one in which the characters needed to be written out of, as there was no set plan in place on how to resolve it. He made the decision to switch the story from being purely-time travel based to one which featured alternate history, while resolving the Temporal Cold War, and wrote the script for both parts himself. Casting Fleck and Winston resumed their recurring roles on Enterprise in both parts of "Storm Front", as Silik and Daniels. J. Paul Boehmer resumed his role from "Zero Hour" as an SS Agent; he had previously appeared as a Nazi in the Star Trek: Voyager episode "The Killing Game", as well as the Vulcan Mestral in the Enterprise episode "Carbon Creek". Two other actors who returned in "Storm Front" from previous Voyager appearances were Tom Wright, who had appeared as Tuvix in the titular episode, and Christopher Neame, who played Unferth in "Heroes and Demons". There were also several Star Trek debuts in "Storm Front", including Golden Brooks, better known for her main cast role in UPN's Girlfriends; and Joe Maruzzo and Steve Schirripa, who both appeared in HBO's The Sopranos. These three appearances were described as "stunt casting" by UPN President Dawn Ostroff. Jack Gwaltney was cast as Vosk, the villain of the two-parter. Filming Filming began on July 15, 2004, and was the first time an episode of the Star Trek franchise was shot digitally rather than on traditional film stock. Director of photography Marvin V. Rush later said that it was an easy transition—that it made filming easier, as a high-definition monitor was available