Larn was an officer in the court of Millennius during Ian Chesterton's trial. He informed Barbara Wright that she would be allowed to attend Ian'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)

Community content is available under CC-BY-SA unless otherwise noted.