Wild About Harry (2000)

Northern Irish TV chef Harry has a history of playing around, being drunk and fighting with his wife. On the eve of his divorce hearing, Harry is beaten up at a garage but goes to work the next day. Acting increasingly disorientated and unusual he finally slips into a coma. Coming out of the coma later, Harry thinks he is 18 and can't remember anything past that. His wife doesn't tell him what a total s*** he has been and tries to form him into a better person. But when Harry discovers his recent past he is shaken and tries to carry on as normal.