He told CultBox: “Crossed fingers, and we’re fully aware that we might not get a Series 2, but we’ve got a lot of bigger stories to tell.”

He continued: “The ideas we’ve been talking about for Series 2 are really going into the core of the show: what happens if you start a new world and fuck it up?”

The show’s first episode aired on BBC One on Monday.

He added: “Also, a really important idea for me, which sadly wasn’t as big in Series 1 as I would’ve liked, is how we treat other species. Humans have been calamitously cruel, it’s a huge moral failing.”