Bare chests inclusive of female upper body nudity is shown during sex, but there is no graphic (genital) female or male nudity.

Full Frontal female Nudity after post coital scene

Topless male & female nudity only.

Brief Full Frontal female nudity from a nude corpse

Season 2, as far as the first seven episodes are concerned, is devoid of nudity. There is still a considerable amount of sexual dialogue and a subplot involving Siobhan attempting to have a child.

Full frontal and rear female nudity and rear male nudity. A man and woman have sex standing up, with the man behind the woman pressed up against a window. Breasts, butt, and shaved pubic region for the woman are shown briefly and in dim lighting.