Tommo (The Deadstone Memorial)
From Tardis Wiki, the free Doctor Who reference
Tommo was a farmer who knew the truth about the identity of Old Man Crawley. After several visits, Tommo finally opened up to the Eighth Doctor and told him about Crawley. After Crawley had been killed and the being from another universe had returned home, Tommo thanked the Doctor and told him that his trauma had now gone. (PROSE: The Deadstone Memorial)