<Tr> <Td_colspan="8"> <P> Homer has to undertake a dangerous mission to save the life of Marge's mother . </P> Guest stars: Billy Boyd as himself and Nikolaj Coster - Waldau as Markery </Td> </Tr> <P> Homer has to undertake a dangerous mission to save the life of Marge's mother . </P> <Tr> <Th> 620 </Th> <Td> </Td> <Td> "Springfield Splendor" </Td> <Td> Matthew Faughnan </Td> <Td> Tim Long & Miranda Thompson </Td> <Td> October 8, 2017 (2017 - 10 - 08) </Td> <Td> WABF22 </Td> <Td> 5.25 </Td> </Tr> <Tr> <Td_colspan="8"> <P> Marge and Lisa have creative differences after creating a graphic novel together . </P> Guest stars: Alison Bechdel as herself, Rachel Bloom as Annette, Roz Chast as herself, Dan Harmon as himself, Marjane Satrapi as herself and Martin Short as Guthrie Frenel </Td> </Tr>

When is the next episode of the simpsons coming out