<Table> <Tr> <Th_colspan="2"> Season </Th> <Th> Episodes </Th> <Th_colspan="2"> Originally aired </Th> <Th> Network </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> 13 </Td> <Td> August 11, 1991 </Td> <Td> December 8, 1991 </Td> <Td> Nickelodeon </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> 13 </Td> <Td> September 13, 1992 </Td> <Td> December 6, 1992 </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> 13 </Td> <Td> April 11, 1993 </Td> <Td> July 11, 1993 </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> 13 </Td> <Td> September 26, 1993 </Td> <Td> January 2, 1994 </Td> </Tr> <Tr> <Td> </Td> <Td> 5 </Td> <Td> 26 </Td> <Td> September 7, 1996 </Td> <Td> March 8, 1997 </Td> <Td> ABC </Td> </Tr> <Tr> <Td> </Td> <Td> 6 </Td> <Td> 8 </Td> <Td> September 6, 1997 </Td> <Td> November 22, 1997 </Td> </Tr> <Tr> <Td> </Td> <Td> 7 </Td> <Td> 31 </Td> <Td> September 12, 1998 </Td> <Td> June 26, 1999 </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Season </Th> <Th> Episodes </Th> <Th_colspan="2"> Originally aired </Th> <Th> Network </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> 13 </Td> <Td> August 11, 1991 </Td> <Td> December 8, 1991 </Td> <Td> Nickelodeon </Td> </Tr>

What happened in the last episode of doug