Evidence of Things Not Seen - S4-E20
Continuity mistake: Will Bailey is wearing a military uniform for the only time in the show (as it is revealed he is a reservist Lieutenant in the USAF). On his uniform shirt there are three medal ribbons-bars. Those ribbon-bars (worn in the correct order from left to right) are as follows: 1. The Air Force Organisational Excellence Award Ribbon 2. The National Defence Service Medal Ribbon 3. The Air Force Training Ribbon. After the shooting incident outside the Press Briefing Room (where gunshots hit one of the windows), Lt. Will Bailey can be seen wearing his three ribbon-bars (incorrect) in the reverse order. Then following on in the two subsequent scenes Will's medal ribbons-bars are back in the correct order. (00:08:05 - 00:16:15)