The Borgias (2011)

S1E23 The Case of the One-Eyed Witness

While enjoying a lavish dinner at an upscale French restaurant, Della and Perry's evening is disrupted by a phone call and the unexpected arrival of an envelope holding $500, sent by an enigmatic woman named Marian Fargo. Soon after, both Marian's husband and her blackmailer, Sam Carlin, are found dead, raising questions and complications for the couple.