 As well as Jeff Tracy , English @-@ Canadian actor Peter Dyneley voiced the recurring character of Commander Norman , chief of air traffic control at London International Airport . His supporting character voices were typically those of upper @-@ class Englishmen . Shane Rimmer , the voice of Scott , was cast on the strength of his performance on the BBC soap opera Compact . Meanwhile , fellow Canadian Matt Zimmerman was selected at a late stage in the process . The expatriate West End actor was given the role of Alan on the recommendation of his friend , Holliday : " They were having great difficulty casting the part of Alan as they wanted a certain sound for him , being the youngest brother . David , who [ was ] a bit older than I am , told them that he had this friend , me , who would be great . " 
