If you can't stop watching Doctor Foster and The Affair, you won't be able to put down this chilling new four-part series.Michael and Ellie are that couple.The ones who have it all.Success, charm, trust...but no relationship is perfect and the events of the past cast a shadow over their charmed life together.When lecturer Michael starts to mentor a new student, Ellie fears that history is repeating itself. As paranoia takes its ugly hold, it's clear some things just can't be forgotten...or forgiven.