Russell (Attack of the Cybermen)

Russell was an undercover Metropolitan Police Officer assigned to infiltrate Lytton's gang in 1985. During what he believed was a jewel heist, he was captured by the Cybermen. The Sixth Doctor took him into the TARDIS. Shortly thereafter, it was attacked by Cybermen, and Russell was killed defending Peri Brown. (TV: Attack of the Cybermen)

Behind the scenes
In the novelisation, he is given the first name of Vincent.