Eileen Lewis

Eileen Lewis was the mother of Dan Lewis. When her son slipped forwards in time to a world controlled by Sontarans, he reconciled with his parents, before Dan left to infiltrate the Sontaran base at Liverpool Docks and save Earth, taking his father's wok with him. (TV: War of the Sontarans)

Upon seeing him take down a platoon of Sea Devils with a blade, Ji-Hun asked Dan where he learned to take down his enemies, and Dan credited his mother. (TV: Legend of the Sea Devils)