<Tr> <Th> No. in series </Th> <Th> No. in season </Th> <Th> Title </Th> <Th> Directed by </Th> <Th> Written by </Th> <Th> Original air date </Th> </Tr> <Tr> <Th> 141 </Th> <Td> </Td> <Td> "Is This My Daughter?" </Td> <Td> Ralph Levy </Td> <Td> Charles Stewart </Td> <Td> September 9, 1967 (1967 - 09 - 09) </Td> </Tr> <Tr> <Td_colspan="6"> Betty Jo returns from a trip to Europe--and brings three handsome jet - setters with her . </Td> </Tr> <Tr> <Th> 142 </Th> <Td> </Td> <Td> "It's Not Easy to Be a Mother" </Td> <Td> Ralph Levy </Td> <Td> Charles Stewart </Td> <Td> September 16, 1967 (1967 - 09 - 16) </Td> </Tr>

How many episodes of petticoat junction are there