Things you may not have noticed (spoilers ahoy!)

[felixmole]

Spoiler below!

Ross stands behind you while you're typing in the code to unlock his room at Omicron Tau, provided you are doing so from the Dive Room. Start typing in his room code, and when it adjusts, get up and look behind you. Doing it early (while the computer is glitching out) may help.

Yeah, I remember when I entered that room and repeatedly tried to close the door - it would re-open everytime with Ross briefly appearing outside.