Released between 2002 and 2004, the Extended Editions of Peter Jackson's The Lord of the Rings -- The Fellowship of the Ring, The Two Towers, and The Return of the King -- add a whopping two hours and 5 minutes of content to an already lengthy trilogy. Some of the additional material consists of lengthened versions of existing scenes, but a good chunk of it is entirely new footage, unavailable outside these cuts. There are also new musical cues and special effects to accompany the added content.
Source：https://www.cbr.com/lord-of-rings-extended-edition-additional-scenes/
