<Table> <Tr> <Th_colspan="2"> Prime Suspect </Th> </Tr> <Tr> <Td_colspan="2"> Prime Suspect title </Td> </Tr> <Tr> <Th> Created by </Th> <Td> Lynda La Plante </Td> </Tr> <Tr> <Th> Starring </Th> <Td> Helen Mirren </Td> </Tr> <Tr> <Th> Composer (s) </Th> <Td> Stephen Warbeck </Td> </Tr> <Tr> <Th> Country of origin </Th> <Td> United Kingdom </Td> </Tr> <Tr> <Th> Original language (s) </Th> <Td> English </Td> </Tr> <Tr> <Th> No. of series </Th> <Td> 7 </Td> </Tr> <Tr> <Th> No. of episodes </Th> <Td> 15 (list of episodes) </Td> </Tr> <Tr> <Th_colspan="2"> Production </Th> </Tr> <Tr> <Th> Producer (s) </Th> <Td> Granada Television / ITV Productions WGBH Boston / Masterpiece Mystery </Td> </Tr> <Tr> <Th> Running time </Th> <Td> 100 minutes </Td> </Tr> <Tr> <Th> Distributor </Th> <Td> ITV Studios </Td> </Tr> <Tr> <Th_colspan="2"> Release </Th> </Tr> <Tr> <Th> Original network </Th> <Td> ITV </Td> </Tr> <Tr> <Th> Picture format </Th> <Td> 4: 3 (1991--1992) 14: 9 (1993--1996) 16: 9 (2003--2006) </Td> </Tr> <Tr> <Th> Audio format </Th> <Td> Stereo </Td> </Tr> <Tr> <Th> Original release </Th> <Td> 7 April 1991 (1991 - 04 - 07)--22 October 2006 (2006 - 10 - 22) </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Prime Suspect </Th> </Tr>

How many seasons of prime suspect tennison are there