Supernatural/What Is and What Should Never Be
From The TV IV
| What Is and What Should Never Be | |
| Season 2, Episode 20 | |
| Airdate | May 3, 2007 |
| Production Number | |
| Writer(s) | Raelle Tucker |
| Director(s) | Eric Kripke |
| Folsom Prison Blues | All Hell Breaks Loose (1) |
| Supernatural — Season Two | |
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What Is and What Should Never Be is the twentieth episode of the second season of Supernatural, and the forty-second episode overall.
Starring: Jared Padalecki (Sam Winchester), Jensen Ackles (Dean Winchester)
Guest Starring: Samantha Smith (Mary Winchester), Adrianne Palicki (Jessica), Michelle Borth (Carmen Porter)
Co-Starring:
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