Superman: Man of Steel is shaping up to be one of the biggest movies 2013 has to offer, even though we know very little about the plot. A call sheet from the set of this superhero adventure has been leaked, and reveals key details regarding Superman's origin. Beware, there may be spoilers below, so read on at your own risk.

The call sheet is dated October 6, 2011, and reveals details regarding Jor-El (Russell Crowe), Superman's Kryptonian father, retreiving a Codex from the central hub. Ayelet Zurer's Lara is also involved in the scene. Take a look at these scene descriptions below.

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"Scene 11: Int Central Hub-Underwater-VFX

Number five (Jor-El) swims up to the central hub, retrieves Codex, alarms go off, dives back under

Scene 25: Ext House Of El-Armory-VFX

Number 11 (Lara) touches number 5's (Russell Crowe) armor, where someone's sword went through, an energy lance

Scene 17-1: Int House Of El-Armory-VFX

Number 5 dons armor, energy lance, Kelex, sounds of Attack

Scene 16-1: Int House Of El-Observatory-VFX

Number 5 and ? .. Kelex and ? comes through the doors into birthing room

Scene 16-2 thru - 16-7: Int House Of El-Observatory-VFX

Number 5 and 11 say goodbye to baby number 1

Scene 16-8: Int House Of El-Observatory-VFX

#46 placed on table ... Codex infused into number 46's heart

Scene 181-2: Int House Of El-Observatory (Flashback)-VFX

Number 5 triggers blue ...begins which penetrates number 46's heart

Scene 16-9 thru - 16-13: Int House Of El-Observatory-VFX

Number 46 pod closes and goes into airScene 19-1 & 19-2: Int House Of El-Observatory-VFX

High Shot ...number 5 and 11 watch from below"