Indo

 was able to telepathically contact Professor Talbot. They were worried about the Sixth Doctor. They enjoyed having the female of the species to possess, Emily Bung, but lost the connection. They then possessed Max Miller and Evelyn Smythe in order to stop the Doctor. A meteor containing their entire species landed in British waters in 1936. (AUDIO: Pier Pressure) The Sixth Doctor encountered them again, along with Robert Knox, in the United States of America in 1865. (AUDIO: Assassin in the Limelight)