What Is and What Should Never Be
| Episode Number | 20 |
|---|---|
| Season | 2 |
| Aired | 2007-05-03 |
| Overview | Dean is attacked by a Djinn... and finds himself in a new reality where his mother is still alive and a mysterious woman holds the key to everything. |
| Runtime | 42 minutes |
| Absolute Number | 42 |
| Finale Type |