These stories often follow a woman named Cora who discovers her husband's infidelity and executes an elaborate "top-tier" revenge plot, often involving legal battles over "sweat equity" or business partnerships.

This is the most famous "unfaithful" arc for Cora. Simon Bricker, an art historian, takes a keen interest in Cora, leading to a physical confrontation in her bedroom with Lord Grantham.

In the world of prestige period drama, Cora Crawley (Lady Grantham) is often at the center of "unfaithful" storylines, though usually as the victim of her husband's wandering eye or through her own high-stakes emotional flirtations. Fans frequently search for the "top" episodes where these tensions peak.

1. Cora Crawley and the "Top" Infidelity Moments in Downton Abbey