Councillor Kostal was sent to meet the Fourth Doctor and Charlotte Willis when they arrived in the year 4000. She killed her fellow councillors. She wanted to kill the Doctor, Charlotte and Leela. (AUDIO: The Foe from the Future)
Behind the scenes[]
According to John Dorney, who adapted the scripts of The Foe from the Future for audio, the only female character in the original draft was Leela. When it was adapted for The Lost Stories, Kostal was cast as female, played by Camilla Power. This altered much of the character's dynamic with Jalnik. The character of Geflo was also similarly changed in the casting stage. (BFX: The Foe from the Future)