In the final episode of the six-part story "Dalek Invasion of Earth," the conquering Daleks put their plan to convert the Earth into a giant space vessel into effect. In order to stop the Daleks, the Doctor is forced to release a powerful, magnetically energized bomb -- which may very well destroy all humans as well. Written by Terry Nation, "Flashpoint" first aired on December 26, 1964. This episode represented the final Dr. Who appearance of Carole Ann Ford, who played the Doctor's granddaughter, Susan. The video version of "Dalek Invasion of Earth" is complete, save for the removal of the "Next Episode" teaser at the conclusion. ~ Hal Erickson, Rovi