Prior to Aeryn going out to give Rygel more ammunition her forehead is noted to be dirty. However, on her return to the bunker, she's cleaned up and neat.
The alien, Jack, tells Crichton the enemy ship will arrive within 6 hours, when the term used by most in this place is 'arns'. But Jack, in A Human Reaction (1999), spent an extensive amount of time examining Crichton's memories and brain, so he probably would have been able to use the term "hours" if he wanted to, and John probably appreciated the brief reprieve from all the alien terms.
In beginning of episode, when Aeryn and John are in bunk together, closeups of Aeryn clearly show piercings in her earlobes from earring or similar. As a Peacekeeper "soldier," doubt earrings would be in character. Makeup should have disguised these piercings.