Having been discovered in the projection room, sitting at a periscope, No.2 calls security. Two security guards manage to creep up on No.6 one of them bashes him over the head with his truncheon. It’s a very curious way for the two guards to lift No.6 out of that chair in the sitting position which looks completely unnatural. The easiest and simply way would have been for the two security guards to take an arm each round their shoulders and simply drag him off that way with feet trailing on the floor!
No.6 had been dealt a heavy blow to his head, rendering him unconscious. We see later that the wound to his lower arm had been treated by medics, but that blow to his head could have fractured his skull, yet there’s no bandage wrapped round his head!
Be seeing you