In this chapter we examine some of the practical aspects of perceiving and remembering faces, and illustrate why, aside from the intrinsic interest in understanding how we deal with facial information, this is a topic of broad theoretical relevance. We begin with practical questions, such as the possibility of improving face recognition on the part of those for whom it is an important professional skill, some aspects of the procedures used in connection with evidence of face recognition given by eye witnesses, and a discussion of the systems used to help witnesses reconstruct facial images. The inevitably restricted data base that this leads to is supplemented by experimental studies of face recognition taking a closer look at some theoretical issues.