Mark Robertson was an episode writer for Thomas & Friends. He has also provided scripts for many other television programmes like "New Voices", Stacey Stone", "Planet Cook", "Chop Socky Chooks", "Gigglebiz", "Dennis & Gnasher", "The Adventures of Jimmy Neutron: Boy Genius", "Bear Behaving Badly", "Baby Jake", "Topsy and Tim", "Chuggington" and "Pet Squad".