In the second episode of the six-part story "The Seeds of Death," the Doctor (Patrick Troughton) wants to find out the reason that T-Mat, Earth's principal transportation system of the 21st century, has broken down. He eventually learns that the system has been targeted for takeover by his old nemeses, the Ice Warriors, who intend to use T-Mat to spread deadly seed pods throughout the world. Originally telecast on February 1, 1969, "The Seeds of Death, Episode 2" was written by Brian Hayles. ~ Hal Erickson, Rovi