Amanda Steele was a pest control team leader.
She and her team were hired by Georgia Donnelly, the owner of Funworld after the skeleton crew of Funworld had suddenly ceased communication following a message talking about a "predator." This predator turned out to be the Vashta Nerada, which had wiped out the entire skeleton crew. She, her team and Georgia met the Fourth Doctor on Funworld. They discovered the truth of what had happened after Phelan created a psychic link between her and the Vashta Nerada. After Phelan was killed, she attempted to kill the Vashta Nerada by drawing them out with meat; however, they ambushed her and Grosta, destroying him.
Georgia escaped using Amanda's ship, but unbeknownst to her and Amanda, the Vashta Nerada had entered the ship and killed her. The Doctor rescued her and took her to her ship. Quickly, the Vashta Nerada latched themselves onto her, so she took poison which she hoped would kill them as they killed her. She was ultimately successful. (AUDIO: Night of the Vashta Nerada)