In the seventh episode, when Nicky, Jonathan and Margaret are on the tug, a person can be seen in the background behind the tug. In the context of the plot, there shouldn't be anyone nearby.
In the sixth episode, Nicky and Jonathon begin riding to the tug at night and arrive the following morning in the seventh episode. However, later in the seventh episode, Margaret manages to ride to the tug within minutes despite not knowing exactly where the tug is located.