The Good-Bye Room (S04E16)

When Barbara (Jillian Boyd), a woman who was adopted as a child, claims that her biological mother, Hilary (Johanna Braddy), was murdered the day after Barbara was born, Rush and the team explore the world of unwed mothers and the maternity homes where they were hidden during the 1950s and '60s. Rush learns about the strangers with whom Hilary was forced to give birth, the people who tricked her into giving up her newborn--and the secret that ultimately led to Hilary's death. While reexamining her personal relationship with her own mother, Rush must find a killer among a few hundred women who were at the maternity home at the time. (Warner Bros. UK)