"ONLY EPISODES 1 & 3 (OF A SIX-PART STORY) STILL EXIST.The TARDIS lands at Gatwick Airport in 1966 & it transpires that aliens (Chameleons) are kidnapping teenagers in order to steal their identities."
"ONLY EPISODE TWO (OF A SIX PART STORY) EXISTS. The TARDIS crew land in Tibet in 1935 and meets up with Professor Travers, a Yeti-hunting adventurer. The original Yeti classic........................."
"EPISODES 2 AND 3 (OF A 6 PART STORY) NO LONGER EXIST. Set on Earth in the future during a new Ice Age, The Doctor encounters awakening aliens frozen in glaciers - "Ice Warriors", travellers from Mars"
"ONLY EPISODE 3 (OF A 6 PART STORY) EXISTS. Set in Australia in the future, the Doctor encounters his evil double (Salamander) who tries to control the world by creating a series of "natural" disasters"
"ONLY EPISODES 3 AND 6 (OF A 6 PART STORY) EXIST. Last story of the series. Another space story featuring the Cybermen, who (with their pets, the Cybermats) invade a Space station known as "The Wheel"."