Jack Harkness's mother

Jack's mother (No name known) was the mother of Jack Harkness. She lived on the Boeshane Peninsula with her husband, Jack and Gray.

Following the attack by the 'worst creatures in existence', she and her son Jack were the only survivors in their family; Gray was captured after Jack accidentally let go of his hand, and Franklin was killed by the creatures, Jack returning home to find his mother cradling Franklin's corpse. (TW: Adam)

Although her final fate is unknown, Jack implied in a conversation with Esther Drummond that he does not know what has happened to his mother, suggesting that she was still alive when he left his time frame. (TW: The Categories of Life)