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Goof: When Lindsay is running the explosion simulation the color key has Mac as blue, Flack as green and Smith as red. However in the simulation itself, Smith is orange, the falling beams are in red.
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Goof: When Mac is taking pictures of Flack after his surgery Flack's mouth is slightly parted but when they show the photo that Mac took Flack's mouth is closed.
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The building that explodes in this episode is the same one that was used on Angel during its first season, exiting the series with an explosion in that season's finale.
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Goof: Mac refers to himself as Lieutenant while the papers Lessing has on him has his rank leaving from the military as Sergeant.
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Goof: When the building blows up, you see some people being blasted sideways, sitting at tables like from a food place. Why would people be sitting calmly while an NYPD officer yelled to run?
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Goof: The paperwork form the bomber had about Mac had a mistake in the title. It read "Enlisted Record and Report of Seperation." It should be "Separation."
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Goof: Because episodes are often shot out of sequence, the cut on Lindsay's forehead keeps disappearing and reappearing.
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In this episode, the CSIs are shown going through evidence, performing makeshift surgery, running investigations/crime scenes/bomb scares, AND disarming bombs. Real life CSIs are much more likely to specialize in one of the above; this approach was very unrealistically Hollywood.
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When Mac received the phone call at the bomber's hideout, his cell phone said "New Text Message."