official videos

• 4 walls mv
• comeback stage: music bank 10.30 - 4 walls, diamond,
• everyshot: luna 10.29, 10.18, f(x) 10.9, 10.25
• f(x)=1cm promo
• front runner stage music bank 11.06 - 4walls
• mbc lyric video - 4walls

performances

• 10.29 m!countdown comeback stage - diamond + (4walls} + intro + cb intro
• 10.30 music bank comeback stage - diamond + 4 walls + interview + interview eng sub
• 10.31 dmz unification shouting concert - fancams diamond + speech + 4walls
• 11.05 m!countdown - 4walls + #4walls1stwin + interview + interview eng sub + 1st win eng sub + mpd congratulations backstage
• 11.06 music bank - 4walls + #4walls2ndwin + encore + 2nd win eng sub
• 11.07 music core comeback stage - diamond + 4walls
• 11.08 inkigayo comeback stage - diamond + 4walls
• 11.10 sbs the show comeback stage - 4walls + #4walls3rdwin + acceptance speech + 3rd win eng sub
• 11.11 prime concert - 4walls
• 11.13 music bank - 4walls + interview + #4walls4thwin + 4th win eng sub + full encore
• 11.14 17th korea-china music fest - 4walls
• 11.14 music core - 4walls
• 11.15 inkigayo - 4walls
• 11.19 m!countdown - 1st place video message by krystal
  • mr removed: 10.30, 11.06, 11.07, 11.08

f(x)=1cm

• end sub episodes: thanks to dailykrystal!!!
  • dailymotion: 1, 2, 3, 4, 5, 6, 7, 8
  • youtube: 3, 5, 6, 7, 8

radio appearances

• 11.03 sbs old school radio (krystal+amber) - end sub part 1, part 2, part 3, part 4
• 11.05 sukira kiss the radio - eng sub + raw + after + one shot interview
• 11.10 sbs power fm cultwo show (krystal,amber,vicrtoria) - raw full cut
• 11.11 jonghyun's blue night radio (krystal) - raw

v app

• 4walls comeback with krystal - eng sub

others

• 11.15 - rnd 2015 congrats video or something??? who knows
• 11.20 - iQIYI interview * no eng sub

subbed songs from the album

• 4walls, (glitter) [?], (deja vu) [?], X, rude love, diamond, traveler, papi, cash me out, when i'm alone