Third in Hallmark's Mrs. Miracle series, after Mrs. Miracle (2009) and Call Me Mrs. Miracle (2010), the title character in both played by the late Doris Roberts. In the first movie, Doris Roberts character of Mrs Miracle says that her name is Emily Merkle.
Grace's referring to Nana as Miss Havisham refers to the spinster character of Amelia Havisham in Charles Dickens' Great Expectations.
The cool car is a 1955 Ford Fairlane Trans Sedan. This same car is featured in Five More Minutes (2021).
Aired as the third of nine original films in Hallmark Movies & Mysteries' 2021 "Miracles of Christmas" lineup.
When Helen looks at a photo of her and her husband, the man in the photo is David Allan Pearson. Probably from a movie they are in together.