On the Head of a Pin
| Supernatural episode | |
|---|---|
| “On the Head of a Pin” | |
| Episode no. | Season 4 Episode 16 (#76) |
| Writer(s) | Ben Edlund |
| Director | Mike Rohl |
| Production no. | |
| Original airdate | March 19, 2009 |
| Episode chronology | |
| ← Previous | Next → |
| "Death Takes a Holiday" | "It's a Terrible Life" |
- angels get Dean to torture Alastair, using his hell-gained skills; Dean ends up in the hospital, with the knowledge that his acquiescence to torture (after only 30 years of torture himself, compared with his father who withstood 100 years of torture) was the first seal that is going to let Lucifer escape ... and the angels are engaged in a civil war. And, Sam is drinking demon blood.