The rising of a powerful democratic student movement in Spain in the sixties represented a substantial stimulus to the repressive modernization of the Franco dictatorship. New containment strategies were adopted in the context of the counter-subversion and intelligence policies that the USA administration and their allies were also implementing. From this assumption, this paper analyzes the specific dynamics of surveillance on student protest, exploring the previous situation at university,the challenges introduced by the youth upheaval, the diverse responses of the establishment, the role of the American aid, and finally the consequences both for the dissidents and for the dictatorship itself.