The Seeds of Doom When a deadly Krynoid seed pod is uncovered in Antartica, the Doctor and Sarah investigate. Ruthless millionaire Harrison Chase wants the pod for himself, and will stop at nothing to get it - even if it means the end of humanity... The Masque of Mandragora After being pulled into the Mandragora Helix, the TARDIS arrives in fifteenth-century Italy at the height of the Renaissance. Against a backdrop of palace intrigue and murder, the Doctor must battle to stop the Helix from gaining a foothold on Earth... The Hand of Fear After being caught in a blast, Sarah is found clutching a fossilised hand, the remains of the Kastrian Eldrad. As Sarah falls under the Kastrian's malign influence, the Doctor battles to stop her from regenerating the ruthless life form.