This paper describes the use of simulated patients in medical education and how actors have been deployed with medical students in Aberdeen. The advantages and disadvantages of using actors for student education are summarised and we conclude with some possible future developments. At the outset, it may be helpful to outline some definitions, as in the review by Barrows (1993). A ‘standardised patient’ is an umbrella term for both an actual patient who is trained to present his or her own illness in a standardised way and also for a simulated patient who is a well person trained to portray an illness in a standardised way. This paper will use these terms but will relate mainly to the use of professional actors (not volunteers from the general public, who are often deployed by medical teachers) as simulated psychiatric patients.