Part 23: Extras for Homecoming
Extras - Sounds
Briefing music, from the soundtrack: 05 Homecoming.mp3
Extras - Mission Images
The unused pre-mission images show The Head and the Total Codex. I guess there's a strong-armed guy who's job it is now to tote around The Head like that; that must get old after a while.
If you lose the mission, The Watcher acquires the Total Codex, which is probably... bad? BTW that's not a screwup in the drawing; The Watcher's right arm is indeed just a stump.