GP Gemma Foster is trusted by her town and everybody likes her, but when she suspects her husband of having an affair, she starts to investigate. However, her digging is set to send her and her family, and even some of her patients into chaos.
As Doctor Foster uncovers secrets that shock her to the core, she has to choose how she's going to react. One thing is certain, she's about to behave in ways she could never have imagined.
Doctor Foster, BBC1, 9pm