Doctor Who: Mission to the Unknown (The Daleks' Master Plan, Part I)

Stranded in the jungles of Kembel, the most hostile planet in the Galaxy, Space Security agent Marc Cory has stumbled across the most deadly plot ever hatched-the Daleks are about to invade and destroy the Universe. Cory has to get a warning back to Earth before its too late-but the Daleks find him first. Months later the First Doctor and his companions arrive on Kembel and find Corys message. But it may already be too late for Earth-the Daleks Masterplan has already begun