Each four disc BD-50 set will include 1080p/VC-1 video and a Dolby Digital 5.1 soundtrack.
Bonus features for 'Smallville' include: Cast/creator commentaries, Unaired scenes, In The Director's Chair with Allison Mack and Smallville's Doomsday: The Making of a Monster.
'Supernatural' will include: The Mythologies of Supernatural: From Heaven to Hell, Key Mythological Precepts, Creator commentary for three episodes, Extended/unaired scenes, and a Gag reel.
We also have a preview of the cover art for both releases:
Suggested list price for each Blu-ray set has been set at $79.98.
You can find the latest specs for 'Smallville: The Complete Eighth Season' and 'Supernatural: The Complete Fourth Season' linked from our Blu-ray Release Schedule, where they're indexed under August 25 and September 1 respectively.