Susan Elrod joins Gail Martin in the studio to delve into the secrets of an English apothecary in on her supposed 10-year anniversary trip in Sarah Penner's, The Lost Apothecary. Hidden in the depths of 18th century London, a secret apothecary shop caters to women. The owner, Nella sells well-disguised poisons to be used against oppressive men. 200 years later, Caroline Parcewell finds an antique vial in the River Thames during her first day in London, discovering a link between the vial and London's long-unsolved apothecary murders.