Happy, suburban families in a happy, suburban neighbourhood. Barbecues and beer. A birthday party. Sparklers and cake. Happy birthday Jack! One year old today!'

Ever seen a dead baby? The detectives don't want to look, either. But they have to - the child wasn't a cot death as first thought; he was smothered. Talk to a mother with a history of dead children. It's hard not to judge. Is she a victim of circumstance or are her children her victims?

Claire bursts back into Duncan's world at a time when everyone is struggling to make sense of this difficult case. She comes back with a problem. She says she loves him but does she just need him for his connections? Helping Claire will push Duncan to the outer circles of the only family he seems to have - the Homicide squad.

Source: Seven