We have gathered five souls together to conduct a séance of our own. We are trying to reach not a person but a conclusion. Is the third Hercule Poirot film from director Kenneth Branagh a wake for a dead franchise, or a celebration and resurrection of a well loved character?  Get ready to hold hands, close your eyes and listen for the tapping of typewriter keys. Two Lambs fell out of the show but three others joined at the last minute to make up the group that is reaching out to the dead this week.