Heartbeat S12E20 - Moving Target

The residents of Aidensfield are terrorised by a ruthless marksman with a sniper, who begins his reign of terror by murdering Liz's ex-boyfriend, a newly arrived doctor she dumped after he refused to tell his wife about their affair. While she attempts to comfort the victim's bereaved spouse, Bellamy is the next target, but luckily escapes with a flesh wound. Merton and DI Shiner fear the target is the police force itself when they discover the assailant is using an Army-issue weapon. As the team race to prevent another innocent killing, Mike receives a life-changing job offer that will shape his career in the force. Meanwhile, a newcomer in a Bentley limousine makes a big impression on Gina and David for two very different reasons.