[written by Michael Allaby ... et al.] [written by Michael Allaby ... et al. [written by Fiona Watt ... et al.] [written by Richard Walker ...[et al. [written by Richard Walker ...[et al.]]. [written by Andrew Bain ... et al.] [written by Fiona Watt ... [et al.] [written by Fiona Watt ... et al. written by Michelle Baran... [et al.] [written by Andrew Bain ... [et al.]