Mariam Andrews (previously S'Avage) was the -wife of Charles S'Avage and the midwife who delivered Anthony and Dee Dee Hutchinson, as well as Rose Lomax in October 2013. However, due to Mariam being intoxicated whilst working, Dee Dee and Rose are inadvertently switched.
In March 2015, Mariam is tracked down by Dee Dee's adoptive parents and Rose's biological parents Diane O'Connor and Tony Hutchinson after they discover Dee Dee and Rose were switched at birth. Mariam admits the truth to Diane and Tony that she was drunk when she switched Dee Dee and Rose. After the reveal, Mariam blackmails Charles over a secret in order to get her off the hook. As a result, Charles has her sectioned. Whilst sectioned, she meets Sienna Blake and reveals she accidentally swapped the babies to her. Sienna gets Mariam drunk in order to find out Charles' secret so she can leave the ward.
In May 2015, after being discharged from the ward, she asks Charles for her old job back. When she sees Charles and Sienna embrace, she reveals to Sienna that Charles isn't a qualified doctor. Mariam later finds evidence that possibly proved Charles was The Gloved Hand Killer, and whilst printing out the copies of the murder victims, the killer enters the office and fatally injects her with a large dose of potassium chloride, killing her instantly. She is later found dead in the office by Sienna. Mariam's death was later ruled as a heart attack caused by her alcoholism. In October 2015, Mariam's killer is revealed to be Lindsey Roscoe.