Complete story — includes the ending
Jim meets his brother in the in-between state, but decides that he needs to stay behind to be with Mel, since she's not coping without him. She can't see him even though he's there, because her grief is strengthening the veil, but there is another ghost who wants her help, and she mistakes the signs as being from Jim. Eventually he gets through to her, and she tries to convince him to cross over, but he refuses. The other ghost is revealed to be the recently deceased stepdaughter of the man who shot Jim. At an accident, a man dies and goes into the light, and Jim steps into the body, despite Melinda's warning.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Ghost Whisperer season 4. HTML formatting and reference markers removed. · Content license