Irongron

Irongron was a 13th century robber baron who had taken control of a castle in Wessex while the nobleman who owned it was away.

Biography
When Irongron and his troops saw a bright light in the sky, Irongron immediately claimed it for his own, naming it "Irongron's star". He and his men followed the "star" as it fell to earth. It was actually a Sontaran spacecraft, which disgorged its occupant, Linx, upon landing. Irongron immediately challenged Linx to a fight, naming him Star Warrior. Linx refused the fight and instead bargained with Irongron, asking for a place to hide his ship and the means to fix it, in return for some of his advanced weaponry, an offer which Irongron readily accepted.

Irongron quickly grew to despise Linx for not coming when he wished and repeatedly insulting him. He also hated Edward of Wessex, who had much more than he in quality food, drink, and weapons. His men captured a scribe from Edward, whom Irongron ordered put in the dungeon, where he later died. While outside his castle the day after, Irongron was shot at by an archer called Hal, sent by Edward. Hal was captured, and Irongron challenged him to face a robot knight, a gift from Linx. Hal won, but only when the Third Doctor shot the control device. When the Doctor fled his castle, Irongron tried to kill him before he escaped. Hal disarmed him.

Soon after, Irongron launched an attack on Edward's castle, which was quickly repelled through the efforts of the Doctor, forcing Irongron's retreat. Upon his return Irongron was given a second robot knight by Link. Irongron tested the knight by fighting it and losing to it, only to discover the Doctor was wearing the suit. Irongron had his men capture the Doctor and used him for target practice. The Doctor escaped with the help of Sarah Jane Smith.

Sarah Jane, disguised as a serving wench, had earlier infiltrated Irongron's kitchen, and drugged the food. The food quickly put Irongron and his men to sleep. Irongron awoke before the rest of his men, discovering Hal attempting to disarm them. Throwing him aside, Irongron went after Linx, accusing him of treachery, and attacked the Sontaran. Linx killed him. (TV: The Time Warrior)

Behind the scenes
was offered the role of Irongron but did not accept. However, he recommended David Daker for the role.