I am playing the Mothership Zeta DLC on the PS3. I got to the mission called "This Galaxy Ain't Big Enough" and made it to the circular room with the alien hologram. Sally goes to open the door, the hologram does its thing and then nothing happens. Sally does not open the door. Any suggestions on what I should do? I would revert back to another save but I only have one save file for this character.

try saving the game in another file and then load that file. if that doesn't work, turn off the console and then load in that file. doing this sometimes works.