S02E20Supernatural season 2 episode 20: What Is and What Should Never Be
Aired 3 May 200743 minRated TV-14
Where to watch Supernatural Season 2 in Australia
Supernatural season 2 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 “What Is and What Should Never Be”
Dean is attacked by a Djinn... and finds himself in a new reality where his mother is still alive and a mysterious woman holds the key to everything.
Episode summary: TMDB.
Before you watch
- It is episode 20 of 22 of season 2, so watch episodes 1 to 19 first.
- It runs about 43 minutes.
- Directed by Eric Kripke, written by Eric Kripke and Raelle Tucker.
- TMDB users rate it 8.6 out of 10 (50 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
- Eric Kripke
- Writers
- Eric KripkeRaelle Tucker
- Guest stars
- Adrianne Palicki as Jessica MooreMichelle Borth as Carmen PorterMelanie Scrofano as Near Dead GirlKwesi Ameyaw as College ProfessorMackenzie Gray as DjinnSamantha Smith as Mary Winchester
Credits: TMDB.
More from Supernatural Season 2
Every episode of Season 2Supernatural 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.