Last episodes of Season 4: Black comedy (SPOLIERS)
The 4-5 last episodes of Season 4 became, probably unintentionally, a black comedy. There were so many bizarre coincidences regarding Brianna's and Roger's lovemaking and Briannas rape, leading to the beating of Roger and him sold as slave to the Mohawks, and Iocasta and Brianna's suitors, etc. All this is supposed be exciting, of course, but it is impossible not to laugh at it, despite the tragedy of the rape etc, just because of the sheer number of coincidences and misunderstandings.
So instead of being an enthralling drama, it became a black comedy.