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)

When Ji-Hun asked Dan where he learned to deal with his enemies by taking them all down at once, without the chance to defend themselves, Dan credited his mother. (TV: Legend of the Sea Devils)