In the cold open they are finishing up a mission and in the very next scene Chuck complains about how they haven't gotten any missions in months.
While approaching the base where St. Germain is being held hostage, Sarah is seen holding the magazine of her M4A1, rather than the vertical grip where her left hand should properly be placed.
On Lester an Jeffs board there is a reference to the intersect. Lester and Jeff have no knowledge of the intersect.
On Jeff's conspiracy board he has a note that Sarah is "to hot for Chuck" instead of "too hot for Chuck".