<Table> <Tr> <Th_colspan="2"> The Flash (season 4) </Th> </Tr> <Tr> <Td_colspan="2"> Home media cover </Td> </Tr> <Tr> <Th> Starring </Th> <Td> <Ul> <Li> Grant Gustin </Li> <Li> Candice Patton </Li> <Li> Danielle Panabaker </Li> <Li> Carlos Valdes </Li> <Li> Keiynan Lonsdale </Li> <Li> Neil Sandilands </Li> <Li> Tom Cavanagh </Li> <Li> Jesse L. Martin </Li> </Ul> </Td> </Tr> <Tr> <Th> Country of origin </Th> <Td> United States </Td> </Tr> <Tr> <Th> No. of episodes </Th> <Td> 23 </Td> </Tr> <Tr> <Th_colspan="2"> Release </Th> </Tr> <Tr> <Th> Original network </Th> <Td> The CW </Td> </Tr> <Tr> <Th> Original release </Th> <Td> October 10, 2017 (2017 - 10 - 10)--May 22, 2018 (2018 - 05 - 22) </Td> </Tr> <Tr> <Th_colspan="2"> Season chronology </Th> </Tr> <Tr> <Td_colspan="2"> ← Previous Season 3 </Td> </Tr> <Tr> <Td_colspan="2"> List of The Flash episodes </Td> </Tr> </Table> <Tr> <Th_colspan="2"> The Flash (season 4) </Th> </Tr>

Number of episodes in the flash season 4