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A police detective is on the trail of a psychopath while dealing with demons of her own in the crime thriller Oxygen. Madeline Foster (Maura Tierney) is a plainclothes detective with the NYPD who isn't especially happy with her job. She drowns her sorrows in alcohol and masochistic sex, though even her husband (Terry Kinney) is unaware of the full extent of her erotic obsessions.
