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" |