To view this content, choose 'Accept and continue' to allow YouTube and its required purposes. To view this content, choose 'Accept and continue' to allow Twitter and its required purposes. Accept and continueITV's director of drama Polly Hill commented: "I'm delighted that this thrilling series is returning for a fourth series. To view this content, choose 'Accept and continue' to allow Google reCAPTCHA and its required purposes. Accept and continueTrigger Point season 4 will air on ITV1 and ITVX, seasons 1-3 are available to stream now.