Leonard was an aide of the Unbound Doctor. He informed him that the emergency phone was ringing. He was later accosted by the Hood. (AUDIO: The City and the Clock)
He was given a message by Bernice Summerfield to give to the Doctor. In a protest against the Doctor, he explained to Benny that the Doctor had shouted at him when he offered his help to clear out the office. (AUDIO: The True Saviour of the Universe)