TAGS:

Marcella is determined to find out why she is plagued with violent blackouts this week.

Her therapist believes losing a baby to cot death might be the root of Marcella’s problem, and encourages her to relive that terrible night…

Meanwhile, the body of another boy has turned up, meaning the police are dealing with a serial child killer.

When Marcella finds evidence linking convicted paedophile Phil Dawkins to the flat where young Leo’s body was found, she takes him in for questioning…