<P> The following is a list of episodes and movies for the television show The Waltons . </P> <Table> <Tr> <Th_colspan="2"> Season </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> <Th_colspan="2"> Nielsen ratings </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> <Th> Rank </Th> <Th> Rating </Th> </Tr> <Tr> <Td> </Td> <Td_colspan="3"> Pilot </Td> <Td_colspan="2"> December 19, 1971 (1971 - 12 - 19) </Td> <Td> N / A </Td> <Td> N / A </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 25 </Td> <Td_colspan="1"> September 14, 1972 (1972 - 09 - 14) </Td> <Td> April 19, 1973 (1973 - 04 - 19) </Td> <Td> 19 </Td> <Td> 20.6 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 25 </Td> <Td_colspan="1"> September 13, 1973 (1973 - 09 - 13) </Td> <Td> March 14, 1974 (1974 - 03 - 14) </Td> <Td> </Td> <Td> 28.1 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 25 </Td> <Td_colspan="1"> September 12, 1974 (1974 - 09 - 12) </Td> <Td> March 6, 1975 (1975 - 03 - 06) </Td> <Td> 8 </Td> <Td> 25.5 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 25 </Td> <Td_colspan="1"> September 11, 1975 (1975 - 09 - 11) </Td> <Td> March 4, 1976 (1976 - 03 - 04) </Td> <Td> 14 </Td> <Td> 22.9 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 5 </Td> <Td_colspan="2"> 25 </Td> <Td_colspan="1"> September 23, 1976 (1976 - 09 - 23) </Td> <Td> March 17, 1977 (1977 - 03 - 17) </Td> <Td> 15 </Td> <Td> 22.3 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 6 </Td> <Td_colspan="2"> 26 </Td> <Td_colspan="1"> September 15, 1977 (1977 - 09 - 15) </Td> <Td> March 30, 1978 (1978 - 03 - 30) </Td> <Td> 20 </Td> <Td> 20.8 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 7 </Td> <Td_colspan="2"> 24 </Td> <Td_colspan="1"> September 21, 1978 (1978 - 09 - 21) </Td> <Td> March 22, 1979 (1979 - 03 - 22) </Td> <Td> N / A </Td> <Td> N / A </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 8 </Td> <Td_colspan="2"> 24 </Td> <Td_colspan="1"> September 20, 1979 (1979 - 09 - 20) </Td> <Td> March 13, 1980 (1980 - 03 - 13) </Td> <Td> N / A </Td> <Td> N / A </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 9 </Td> <Td_colspan="2"> 22 </Td> <Td_colspan="1"> November 27, 1980 (1980 - 11 - 27) </Td> <Td> June 4, 1981 (1981 - 06 - 04) </Td> <Td> 30 </Td> <Td> 18.6 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> Movies </Td> <Td_colspan="2"> 6 </Td> <Td_colspan="1"> February 22, 1982 (1982 - 02 - 22) </Td> <Td> April 27, 1997 (1997 - 04 - 27) </Td> <Td> N / A </Td> <Td> N / A </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Season </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> <Th_colspan="2"> Nielsen ratings </Th> </Tr>

How many season of the waltons are there