: There is a secret bonus disc hidden under the lid of the box. To find it, you must use the included DHARMA blacklight pen
Many complete series sets include a 7th disc here: Lost: On Location – a 90-minute making-of documentary focusing on the Hawaii shoots. Lost -TV Series 2004-2010- Seasons 1-6 BluRay 7...
: A 39-minute reflection on the six-year journey filmed on location in Oahu. Artifacts of the Island : A look inside the show's prop house. : There is a secret bonus disc hidden
August 24, 2010 (US); September 13, 2010 (UK "barebones"); October 11, 2010 (UK Collector's). 2010 (UK "barebones")
To understand why you need the complete box, you must appreciate the narrative arc.