On the plane, when Emily hugs Irina you can see Emily's left hand, intact, but her ring finger had been cut off in a previous episode and shown bandaged.
When first seen and in subsequent appearances, the earrings Irina leaves for Sydney are single stones on posts. In this episode they become double stones with one stone on a drop.
In episodes where German is shown (i.e., on a computer screen) the text is sometimes misspelled or makes no sense at all. For example in the episode "Truth takes Time" one screen reads "Das Bringen Ordnet... Ein" which would translate to "That Brings Sorting... On (or Activated)". When it is spoken, the pronunciation is sometimes so poor, even German natives can't understand a word.