Hannah Swensen discovered a dead body and the sheriff commented that they have her fingerprints on file, due to a car ring (in "Murder, She Baked: A Deadly Recipe"). However, Hannah's fingerprints were already on file because she helped out her baking rival Melanie in Melanie's bakery's kitchen where she was later found dead ("Murder, She Baked: A Peach Cobbler Mystery").
While Hannah, Andrea, and Delores are having dinner in Hannah's kitchen, Andrea pours Delores and Hanna wine-her pouring and handing Hannah a glass gets repeated.
Chad tells Hannah a story about when he was in the Marines, saying his drill sergeant yelled at him. Marines don't have drill sergeants, they have drill instructors. The Army has drill sergeants. Same job but different terminology. Those in either service know the difference.