Elder McNamara stuck in corridor on mission "still in the dark". Done the first part, got rid of the ranger, got the collar taken off. Now he's just standing in the corridor and when i talk to him he says "what i need to discuss can wait until i get settled in the control room". I've gone off and done quite a few missions and quite a lot of exploring and scavenging (about 20 hours worth), checking in with him every now and then, but he wont budge.