'Last Tango in Halifax' is a six-part mini-series that focuses on childhood sweethearts Alan (Derek Jacobi) and Celia (Anne Reid), both widowed in their 70s, fall for each other all over again when they are reunited over the internet after nearly 60 years. As their lives collide for a second time, the couple laments what might have been as they take audiences on a life-affirming journey together. While their relationship is a celebrator tale of the power of love at any age, it is also a story about family and the complications the relationship causes, especially for their grown daughters.