A Mother's Son is a two-part British crime thriller from 2012 now available on BritBox and Prime Video that explores an impossible moral dilemma. The series follows Rosie, a divorced mother living in Suffolk, who becomes convinced that her teenage son Jamie may be involved in the murder of a local schoolgirl. Rather than immediately alerting the authorities, Rosie must navigate the agonising choice between protecting her son and doing what she believes to be the morally correct thing by turning him over to the police.

When schoolgirl Lorraine Mullary is found murdered, damning evidence emerges against Jamie: bloody trainers hidden in his bedroom and the victim's missing phone discovered in his room. Rosie initially keeps her suspicions secret from her current partner Ben and seeks advice from Jamie's father David, though her growing conviction eventually creates tension throughout her blended family as the police investigation continues independently. Running to just over an hour and a half across its two episodes, the series has been praised by critics including The Guardian as "tense, absorbing, thrilling," and its examination of maternal instinct against morality proves particularly resonant with viewers.