AMSTERDAM.- What drives a person to constantly take on a new personality? What characterises a man who systematically avoids being recognised as himself? In Foam 3h, Sara-Lena Maierhofer (1982, Germany) shows her investigation into the life and the lies of swindler and fraud Christian Karl Gerhartsreiter, alias Clark Rockefeller. In Dear Clark, Sara-Lena Maierhofer tries to approach a swindler and fraud whose life has consisted of carefully constructing and then erasing his identity. After she fails in convincing the man to meet with her personally, she decides to study him from a distance. Step by step, she becomes better acquainted with her subject: his appearance, his idiosyncrasies, his intentions. Christian Karl Gerhartsreiter (1961) was born in Germany and moved to America to study as a teenager. Since that time he has used many aliases and passed himself off as a success (varying from presenter