On the Head of a Pin
| Episode Number | 16 |
|---|---|
| Season | 4 |
| Aired | 2009-03-19 |
| Overview | Can torture be God's work? After seven angels are mysteriously murdered, Castiel and Uriel demand that Dean use the agony-inducing skills he learned in Hell to extract information from Alastair. |
| Runtime | 43 minutes |
| Absolute Number | 76 |
| Finale Type |