Serial killer and rapist Stephen Port used a number of dating sites to lure four young men to his flat in Barking, where he poisoned them with lethal doses of date-rape drug GBH.
Luke Harlow met schoolgirl Kayleigh Haywood on Facebook. After exchanging 2,600 messages over 13 days, he enticed Kayleigh back to his flat, with tragic conesquences.
Emma Kenny
Guest Star
Siobhan McFadyen
Sam Meadows