No. Sir David Attenborough's Wild Isles has no sixth episode, according to the BBC. Executive Producer Alastair Fothergill has confirmed that Wild Isles was commissioned as a five-part series in 2017. However, two nature charities – the RSPB and WWF – have funded a bonus film called Save Our Wild Isles, produced  by Silverback Films, the team behind Wild Isles. Save Our Wild Isles was purchased by the BBC and will air exclusively on BBC iPlayer later this year.