First Doctor

In a parallel universe, the First Doctor visited Logopolis and was killed by the Valeyard. (AUDIO: He Jests at Scars...)

Biography
The First Doctor travelled with Steven Taylor and Dodo Chaplet. On one of their travels, they went to Kiev in the 13th century. A short period later, they went to Logopolis.

Later, the Valeyard planned to go back in time and kill Dodo to prevent the First Doctor's visit to Logopolis and the Fourth Doctor's subsequent visit to the same planet. (AUDIO: He Jests at Scars...)