An alien species practice ritual bathing, and there are many scenes throughout the series where a family bathes together, and being physically close/affectionate with family members while nearly nude is considered normal in their culture. No incest is meant to be implied, but some scenes, for example, a mother embracing her teenage son while wearing nothing but a draping of beads are clearly intended to make the audience uncomfortable to highlight the (literal) alien-ness of the characters. There are several scenes throughout the series where an alien character makes her human inlaws uncomfortable by pressuring them to participate in her species' practice of communal bathing. They do it to appease her but clearly do not like it, which she is entirely aware of. Domestic violence is implied and shown onscreen for two characters. S2E4: two characters discuss having raped in the past. S2E5: there are very brief flashes of the assaults throughout the episode as the two characters hallucinate, but nothing clear/graphic. The female character remembers her assailant shining a torch in her face so she could not identify him. Throughout the episode, she hallucinates her current love interest as the faceless attacker. The male character was gang raped by alien soldiers as a 15-year-old, he sees brief flashes of shattered glass and spattered blood. In season 3, the villains are a violent species who are said to enslave, rape and eat weaker species. The main antagonists are a father and daughter in an incestuous relationship. This is depicted as normal for their species, and disturbing to all other characters. S3E11: a female antagonist rapes a male main character. The beginning of the assault is shown; she pins him down and he briefly struggles, before pretending to consent because he needs to keep her distracted while other protagonists are enacting a plan, and because she is stronger and could kill him. They are shown 'cuddling' after the assault; he is clearly uncomfortable and her body language is like a predator playing with prey. Spoilers: S3E4: it is revealed that a woman's lover has actually been stalking her and her ex-fiancé for years, and is responsible for the rape she confided in him about the previous season. She kills him.