In their reply to my recent paper on Munchausen's syndrome by proxy, Professor Southall and Dr. Samuels concede that some things may be learned from my observations. They do not attend to the main argument of the paper, however, that the proportion of research interest in their use of covert video surveillance merits consideration of the research protocol by an independent research ethics committee. It will not do simply to assert that the use of this technology for the purposes outlined in their accounts is not research. I formulated arguments based on facts divulged in those published accounts for regarding their work as containing a considerable proportion of research activity. Unfortunately their reply did not address these arguments. Until such points are adequately answered the protection of patients calls for satisfactory judgments to be made on certain important issues which any research ethics committee would be obliged to consider in an evaluation of their activities. I suggest that some of these features will create more difficulties for approval of such a protocol than others.