"Mark Linfield is a British writer, producer and director of nature documentaries for cinema and television. He is best known for his work with the BBC Natural History Unit as a producer of two episodes of the television series Planet Earth (2006) and as writer and co-director of the associated feature film Earth (2007)."@en . . "British television producer" . "Linfield, Mark"@en . . "Mark Linfield"@en .