Jack Tyler

Jack Tyler was a man who lived in Fetchborough with his paternal grandmother Martha Tyler.

Biography
When the Fourth Doctor and Leela met Jack in July 1977, they asked him to keep safe. He helped them save the planet from the Fendahl, but was almost killed by a Fendahleen. He later escaped the Fetch Priory with his grandmother and Adam Colby after it exploded. (TV: Image of the Fendahl)