Indeed, as reimagined by Steven Moffat and Mark Gatiss, Watson is a veteran of the war in Afghanistan, so Freeman immediately envisaged him as someone who is ‘strong and silent and [has] nothing unnecessary about him—no fat, no extras, no vocal flourishes, no physical flourishes. He’s a man’s man. He has weight because of his experience in life and death.’
Martin Freeman on Sherlock’s Watson (x)