<Tr> <Th> No . overall </Th> <Th> No. in season </Th> <Th> Title </Th> <Th> Directed by </Th> <Th> Written by </Th> <Th> U.S. air date </Th> <Th> Canadian air date </Th> <Th> Prod . code </Th> <Th> U.S. viewers (millions) </Th> </Tr> <Tr> <Th> 79a </Th> <Td> 1a </Td> <Td> "Pups Save a Blimp" </Td> <Td> Charles E. Bastien </Td> <Td> Steve Sullivan and Andy Guerdat </Td> <Td> February 6, 2017 (2017 - 02 - 06) </Td> <Td> March 4, 2017 </Td> <Td> 401 </Td> <Td> 1.41 </Td> </Tr> <Tr> <Td_colspan="9"> Cap'n Turbot grows attached to his new invention, a computerized weather blimp named "Blimpie ." </Td> </Tr> <Tr> <Th> 79b </Th> <Td> 1b </Td> <Td> "Pups Save a Chili Cook - Off" </Td> <Td> Charles E. Bastien </Td> <Td> Alex Ganetakos </Td> <Td> February 6, 2017 (2017 - 02 - 06) </Td> <Td> March 4, 2017 </Td> <Td> 401 </Td> <Td> 1.41 </Td> </Tr>

When does season 4 of the ranch premier