Larn was a duty officer in the court of Millennius.
Biography
Larn informed Barbara Wright that she would be allowed to attend Ian Chesterton's trial.
He later informed Barbara that she had a call from Susan Foreman. Larn also helped apprehend Eyesen when he tried to steal one of the micro keys. (TV: The Keys of Marinus)
Appearance
Larn had an open and friendly face. (PROSE: Doctor Who and the Keys of Marinus)