All The Lonely People - S14.E116

Rawton goes undercover as a lonely heart to find a possible serial killer who has claimed three victims. The only person who can identify the possible culprit is a flakey chef whose description of the assailant is less than clear cut. When Rawton's second date is identified as the man who was with the third victim on the night she disappeared, she tries to plug him for information as to the motive for his crimes. However, when the second victim turns up alive and well, suspicions start to fall on whether or not the three victims are connected. When the boyfriend of the third victim is discovered to have used and abused prostitutes, it looks less and less likely that a serial killer is at large, until Rawton's date abducts her.