S04E16Supernatural season 4 episode 16: On the Head of a Pin
Aired 19 March 200943 minRated TV-14
Where to watch Supernatural Season 4 in Australia
Supernatural season 4 is streaming in Australia on Prime Video (subscription), HBO Max (subscription) and Stan (subscription). You can also buy it on Apple TV from $29.99.
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Availability checked 16 November 2026.
What happens in “On the Head of a Pin”
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.
Episode summary: TMDB.
Before you watch
- It is episode 16 of 22 of season 4, so watch episodes 1 to 15 first.
- It runs about 43 minutes.
- Directed by Mike Rohl, written by Ben Edlund.
- TMDB users rate it 8.7 out of 10 (43 votes).
Supernatural trailer
The official trailer for the series (no preview of this episode has been published).
Play video: Supernatural trailer
Cast and crew of this episode
- Director
- Mike Rohl
- Writer
- Ben Edlund
- Guest stars
- Misha Collins as CastielJulie McNiven as Anna MiltonChristopher Heyerdahl as AlastairBrent Woolsey as CopCrystell Hendricks as AngelRobert Wisdom as UrielGenevieve Padalecki as Ruby
Credits: TMDB.
More from Supernatural Season 4
Every episode of Season 4Supernatural episode guide
Episode names, air dates, runtimes, stills and ratings: TMDB. Air dates are the first broadcast anywhere; where it streams is our daily Australian check.