Korbin Thessinger

 was a composer. He was visited by Will Alleron and talked but Alleron's sister. He was an old friend of the Seventh Doctor. He tutored Will and Lomas Alleron. He was annoyed that Will went of to war and Lomas stayed. He didn't understand why Lomas wanted to study bioharmonics. He took Hex and Lilian Dillane to the archive, to look for information about Bioharmonics for the Doctor. (AUDIO: Nocturne)