Lewis and Hathaway investigate the murder of a baby-sitter, and uncover a swingers' network. The detectives must establish whether the girl's fate is connected to her time spent in a children's home, or whether she was an unintended victim.

Abigail Hardingham, Anna Wilson-Jones, Bronson Webb, Ciarán McMenamin, Con O'Neill, Gary Kemp, Georgia Taylor, Gregor Truter, Katrine De Candole, Leila Mimmack, Lucy Cohu, Merveille Lukeba