Донна Ноубл
Cribbins played Tom Campbell, a companion to Dr. Who in the 1966 film "Daleks' Invasion Earth 2150 A.D." 41 years later, he became the only actor to have played two separate companions when he began appearing in the revival series of "Doctor Who" as Wilfred Mott, the grandfather of regular companion Donna Noble and a temporary companion to the Tenth Doctor.