It has been asked why No.6 did not escape the village when he had the opportunity to do so, but instead, gave the detonator to the retiring No.2 so that he could get away instead of No.6. Well, as we witness in the episode, it is No.6 who stops the new No.2 from removing that Great Seal of Office from about his shoulders. If No.6 had tried to escape in the same way, who might he have trusted to do likewise for him?
Also, as the helicopter was departing the village for the landing stage, the new No.2 looked to the skies in surprise to see that the helicopter was suddenly turning back to the village! I suppose the pilot could have received an order from the Control Room. Maybe the helicoper was being brought back to the village by remote control at the hand of an operator in the Control Room, as in the same way No.6 was in Arrival when No.6 tried to escape in the helicopter. Or perhaps the retiring No.2 had had a change of heart. After all, and to use his own words, "They'll get me wherever I go." And so decided to return to the village, the possibility of his assassination/execution now well and truly over. And so might very well live out the rest of his life in peaceful retirement in the Old People's Home.
I'll be seeing you