My Family (2000)

S5E8 The Mouth Trap

During a procedure, Ben's patient confesses to murdering his wife while still under anaesthesia. Meanwhile, Susan, engrossed in murder mysteries, takes it upon herself to investigate the case and bring the killer to light. However, her amateur sleuthing leads her into a web of deceit as she becomes entangled in a cover-up of her own, complicating matters further.