In the conclusion of the three-part story "Silver Nemesis," the Doctor (Sylvester McCoy) steps up his efforts to hurl the deadly living-metal Nemesis statue back into Deep Space. Meanwhile, Ace (Sophie Aldred) finds herself locked in mortal combat with the Cybermen, who want to get their hands on the precious validium within the statue. Musical-comedy favorite Dolores Gray makes a rare TV appearance as Mrs. Remington. Written by Kevin Clarke, "Silver Nemesis, Episode 3" originally aired on December 7, 1988. ~ Hal Erickson, Rovi