"Prisoners of War" is the name of the Israeli TV show that Homeland was based on. Prisoners of War ended with a cliffhanger that so far has never been completed
Originally there was a scene where Carrie and Franny briefly reunited, but it wasn't shot for two reasons, according to co-creator Alex Gansa: 1) the episode was over budget and 2) Claire Danes felt strongly that Carrie wouldn't do that because she said goodbye to Franny forever in season 7.
Series finale.