<Table> <Tr> <Th_colspan="2"> This Is Us (season 1) </Th> </Tr> <Tr> <Td_colspan="2"> DVD cover </Td> </Tr> <Tr> <Th> Starring </Th> <Td> <Ul> <Li> Milo Ventimiglia </Li> <Li> Mandy Moore </Li> <Li> Sterling K. Brown </Li> <Li> Chrissy Metz </Li> <Li> Justin Hartley </Li> <Li> Susan Kelechi Watson </Li> <Li> Chris Sullivan </Li> <Li> Ron Cephas Jones </Li> </Ul> </Td> </Tr> <Tr> <Th> Country of origin </Th> <Td> United States </Td> </Tr> <Tr> <Th> No. of episodes </Th> <Td> 18 </Td> </Tr> <Tr> <Th_colspan="2"> Release </Th> </Tr> <Tr> <Th> Original network </Th> <Td> NBC </Td> </Tr> <Tr> <Th> Original release </Th> <Td> September 20, 2016 (2016 - 09 - 20)--March 14, 2017 (2017 - 03 - 14) </Td> </Tr> <Tr> <Th_colspan="2"> Season chronology </Th> </Tr> <Tr> <Td_colspan="2"> Next → Season 2 </Td> </Tr> <Tr> <Td_colspan="2"> List of This Is Us episodes </Td> </Tr> </Table> <Tr> <Th_colspan="2"> This Is Us (season 1) </Th> </Tr>

How many episodes are there in this is us season 1