In the "Come Fly With Me" quest chain, I just finished clearing the basement of nightkin and sent Harland away. After going back upstairs, I can't open the research labs door to talk to the ghoul Jason again because I don't have the key. Using the intercom only allows me to be told "stop messing around with the intercom".
(Also, the lock is not pick-able.)
Best Answer
Try leaving the area and coming back after 3 game days.According to the comments, the 3-day trick does not work here. You've definitely hit a glitch, one which is now accounted for on the Wiki.Thus, you're probably looking at reloading a saved game from before starting the quest, if you have one available. Sorry.