<Tr> <Th> Original network </Th> <Td> PBS Kids </Td> </Tr> <Tr> <Th> Picture format </Th> <Td> HDTV 1080i SDTV 480i (seasons 1--4) </Td> </Tr> <Tr> <Th> Original release </Th> <Td> September 4, 2006 (2006 - 09 - 04)--April 1, 2015 (2015 - 04 - 01) </Td> </Tr> <Tr> <Th_colspan="2"> External links </Th> </Tr>

Who plays the voice of the man in the yellow hat