The Monster at the End of this Book
| Episode Number | 18 |
|---|---|
| Season | 4 |
| Aired | 2009-04-02 |
| Overview | Familiar plot. Familiar characters. Sam and Dean come across a series of graphic novels called "Supernatural" featuring two demon-hunting brothers named Sam and Dean. |
| Runtime | 42 minutes |
| Absolute Number | 78 |
| Finale Type |