I am writing a story where one of the characters has been in a coma for a few weeks as the result of a car accident. Now I want to bring him out of the coma, but I also want him to suffer a degree of memory loss. Ideally he should not remember the last relationship he had (because this would throw a beautiful big cat among the pigeons).
How realistic is this, and what kind of memory loss could he have? And would it be possible for his memory to return at a later date, in case I wanted that to happen (which is a possibility)? Could he remember his family and a girlfriend from long ago but forget his last few years?
Thanks in advance to anyone who can help!