6-part crime drama series starring Martin Freeman and Imelda Staunton about the real life investigation into the disappearance of Sian O'Callaghan in 2011. Freeman plays the detective who pieces together her last movements in the hope of finding her alive. Maimie McCoy played DC Tracy Joyce and Annabel Mullion played Anne Harrison. The show is written by renowned crime writer Jeff Pope. 2020 BAFTA nomination for Best Mini-series. The show was broadcast on ITV in 2019 and is also available on Britbox and Prime Video.