Doc ZoneTemporada 4Temporada 4Número da temporada4Season name—ImagensSem imagemPôster#ImagemTítuloExibido1Malls R Us20 de ago. de 20092The Spies Who Came in from the Sea20 de ago. de 20093The Beat Goes On (1)27 de ago. de 20094The Beat Goes On (1)3 de set. de 20095Rise Up (1)10 de set. de 20096Rise Up (2)17 de set. de 20097Pedal Power24 de set. de 20098Canada, Above and Beyond - First Flight8 de out. de 20099Canada, Above and Beyond - Conquering Geology15 de out. de 200910Canada, Above and Beyond - Lifelines22 de out. de 200911Canada, Above and Beyond - Dancing with Danger29 de out. de 200912Berlin, 20 Years After5 de nov. de 200913After Elizabeth II12 de nov. de 200914Up Against the Wall19 de nov. de 200915Carbon Hunters26 de nov. de 200916The Secret World of Shoplifting3 de dez. de 200917Mounties Under Fire21 de jan. de 201018CannaBiz28 de jan. de 201019Hyper Parents and Coddled Kids4 de fev. de 201020Google World11 de fev. de 201021Tasered18 de fev. de 201022Love, Hate & Propaganda: The Strongmen4 de mar. de 201023Love, Hate & Propaganda: Selling War11 de mar. de 201024Love, Hate & Propaganda: Meet the Enemy18 de mar. de 201025Love, Hate & Propaganda: Truth and Total War25 de mar. de 201026Love, Hate & Propaganda: Hiding the Horrors1 de abr. de 201027Love, Hate & Propaganda: Changing the Story8 de abr. de 2010