The latest episode - which aired on BBC One last night - left viewers frustrated over the unrealistic storylines as a pilot crash landed in Nazi-occupied France without being spotted.
UK critic Sarah Vine rates Earth, available to watch on Mondays on BBC2. She says Chris Packham, who grew up in Southampton, is officially the heir to David Attenborough.
World on Fire series two cast and writer Peter Bowker on telling the story of World War Two through the eyes of ordinary people bbc.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from bbc.co.uk Daily Mail and Mail on Sunday newspapers.