Morse Code during the opening title says: Is still there
The name of the Texan Ambassador to Cheyenne, Sam Travis, combines the names of two 19th century patriots of Texas, Sam Houston and William Travis.
'Richard Speight Jr'. who also played "Muck" in the HBO miniseries Band of Brothers (2001) is in a scene where they are clearing a vehicle from the road in order to hold up and seize an A.S Army Convoy. When he turns and faces the camera his name tape reads "MUCK".
This is currently scheduled to be the final episode as CBS has announced the cancellation of the series (again).
When the Captains are reviewing the evidence on the laptop from Major Beck, at the end of the episode, they all have their PC's (Patrol Caps) on when in fact, when you're in any of the armed services, if a room has an enclosed area with 3 or more walls (inside a building in this case) you are not allowed by uniformed military regulations, to wear a cap in doors, unless it being ceremonial of a promotion of some sort.