Heidi Gefsky is a character featured in Season 4. She and her husband, Cal, were among the tourists visiting the Allasco Vineyard and Winery in Sonoma County, California. When Ben Gruber visited the vineyard and introduced himself to everyone, he later went to his room where he died of a heart attack. Upon finding his body and the load of money, she, alongside her husband, Cal, Sylvia Willis, Dr. David Sobin, Pierre LaCoste, and butler Ricardo agreed to split the money and clear any trace of Gruber being there. She and the other 5 were later arrested for covering up a crime.