Muller sets out to impersonate Bartok, aided by the fact he studied psychoanalysis in medical school before dropping out. He takes a photograph of the doctor and uses it as a guide to cut an identical scar on his own face. Unfortunately, the developers of the photograph reversed the negative, so now Muller has the scar on the wrong side. He discovers the mistake only after he has already murdered Bartok and is preparing to dump the body in the river. He has no choice but to go through with the plan anyway. Luckily, no one (except the office cleaning lady, whose suspicions he manages to lull) notices the difference, not even Evelyn or Bartok's patients.