Guest Stars David Tennant voices Don Lynn Georgia Moffett voices Laura Lynn Michael Sheen voices Paul James McAvoy voices Golden Haired Man Anna Lundberg voices Marion Sandra Oh voices Siamese Cat Diane Morgan voices Gryphon Nonso Anozie voices Wyvern Neil Gaiman voices Dead Crow David Gyasi voices Grey Cat Rosie Day voices Kitten Joe Lycett voices Black Cat Tom Wu voices Pegasus Co Starring Louise Williams as Laura Lynn Nicole Evans as Marion Bruno Aversa as Golden Haired Man Jeffrey Mundell as Don Lynn Mark Osbond as Paul