From the Blu-ray - Theatrical versions.
v. 1. The fellowship of the ring
v. 3. The return of the king.
From the Blu-ray / DVD Combo - Extended editions.
Disc one (remastered Blu-ray): The fellowship of the ring (228 min.), extended version disc 1
Disc two (remastered Blu-ray): The fellowship of the ring, extended version disc 2
Disc three (original DVD): The appendices part one: from book to vision
Disc four (original DVD): The appendices part two: from vision to reality
Disc five (original DVD): The fellowship of the ring behind the scenes
Disc six (remastered Blu-ray): The two towers (235 min.), extended version disc 1
Disc seven (remastered Blu-ray): The two towers, extended version disc 2
Disc eight (original DVD): The appendices part three: the journey continues...
Disc nine (original DVD): The appendices part four: the battle for Middle-earth begins
Disc ten (original DVD): The two towers behind the scenes
Disc eleven (remastered Blu-ray): The return of the king (263 min.), extended edition disc 1
Disc twelve (remastered Blu-ray): The return of the king, extended version disc 2
Disc thirteen (original DVD): The appendices part five: the war of the ring
Disc fourteen (original DVD): The appendices part six: the passing of an age
Disc fifteen (original DVD): The return of the king behind the scenes.