 The decision to introduce a Nazi threat in Enterprise was decided upon when the producers were wrapping up the third season . Executive producer Brannon Braga 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 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 . 
