Sheelagh Lawson was the uncredited design assistant on the Doctor Who television stories The Ark in Space (INFO: The Ark in Space), The Sontaran Experiment (INFO: The Sontaran Experiment) and State of Decay. (INFO: State of Decay) She was later an uncredited desugh draughtswoman on The Masque of Mandragora. (INFO: The Masque of Mandragora)