Just prior to Mark and Dave's ambush, it shows 'Pocatello, Idaho' on the screen. The ambush was at Mark's house which is actually in 'Chubbuck, Idaho' which is a suburb of Pocatello. I bet there are a lot of angry Chubbuckians out there.
When Phil Keoghan was explaining Kraig's dream to the audience of Engineers at his ambush, he said Kraig's wife and kid instead of kids (Kraig has 3 children).
Close-captioning in this episode was terrible. Words were frequently misspelled or ran together. Names were also often misspelled, although generally seemed to be corrected after the on-screen captions giving away their correct spellings appeared. Phil Koeghan's name was misspelled both times the full name was said out loud, once as "Bill Kogan" and another time as "Phil Kog again."