International courts and tribunals differ in their institutional composition and functions, but a shared characteristic is their reliance on the contribution of individuals other than the judicial decision-makers themselves. Such 'unseen actors' may take the form of registrars and legal officers, but also non-lawyers such as translators and scientific experts. Unseen actors are vital to the functioning of international adjudication, exerting varying levels of influence on judicial processes and outcomes. The opaqueness of their roles, combined with the significance of judicial decisions for...