I'd lost Rex and Arcade and decided to move on.. During Still In The Dark, I went into Vault 22 to get the filters and, like another poster mentioned, my companions magically appeared. Because of my companionless existence I'd started a second game which also ended up in the loss of companions. On a whim I brought that person to the bottom level of Vault 22 and lo and behold, there they were. Something magical? Or could it be a glitch in our favor? Hopefully I don't have to drudge down here every time they disappear.

that place makes my companions goofy..i have them set to passive yet they run around like omg there a monster behind that wall...

Companions seem to be super bugged. I never used any companions yet and I've already beaten the game on hardcoe.

I'm glad I saw this. I was going to go down into 22 tonight and I would cry if I lost ED-E and Boone..........yes I would

I lost my companions again a couple more times and this Vault 22 thing seems to work every time. Something interesting I came across was after going to the Vertibird, Arcade disappeared again. Went down to Vault 22 and suddenly he reappeared and started the dialog about the Vertibird.. Odd.

again this seems to be one of those glitches that just randomly appears I have gone into vault 22 3 or 4 times with ED-E and boone and didnt loose them once.