Emma and other Jane Austen novels provide irresistible templates for modern romantic comedies. But for viewers who prefer a darker look at love—V is for vengeance, not valentine—The Count of Monte Cristo is a far more satisfying prototype. Fitting that revenge-fueled mold, British television series Doctor Foster centers around Gemma (Suranne Jones), a dedicated small-town physician who begins to suspect that her adoring husband, Simon (Bertie Carvel), is having an affair. It would be wrong to reveal here how Gemma handles her suspicions, but some British reviewers have referenced Medea. —Alessandra Stanley