Series 9 Episode 8 discussion

[loladom]

Question - (bit confused at the end)
Were Ruth's tears and the freezed poses/shock of the Alpha team for the loss of Lucas or for the suspision Harry is dead? Did Harry have coms on or not, would they have heard "shoot me now" and assumed he was a gonna? Or, having found that the bomb was a dud they believed Harry was a gonna because there was no bargaining tool and thus eliminating any chance Harry would talk him down?

Did Harry go back to the grid before the HS phone call?