Father of Alfie Enoch.
Of the four original actors to travel in the Tardis in the Doctor Who TV series, William Russell (II) is the only one NOT to make a reappearance in the series. Although the character was original supposed to appear in the 1983 series "Mawdryn Undead", due to scheduling issues, the role was change to bring back The Brig. Lethbridge Stewart (Nicholas Courtney).