Helen Walker. Helen Walker was >> in Plagues and Pestilence: How Pandemics Changed the World as 'Narrator'.Ian Cross. Ian Cross was >> in Plagues and Pestilence: How Pandemics Changed the World as 'Writer, Director, Producer'Helen Walker. Helen Walker was >> in Plagues and Pestilence: How Pandemics Changed the World as 'Editor'Jake Michael Christian. Jake Michael Christian was >> in Plagues and Pestilence: How Pandemics Changed the World as 'Camera Operator, Assistant Editor'Emilia Crudo. Emilia Crudo was >> in Plagues and Pestilence: How Pandemics Changed the World as 'Assistant Editor'Paul Mounsey. Paul Mounsey was >> in Plagues and Pestilence: How Pandemics Changed the World as 'Music'